BL4 Mayhem Mode , Complete Guide to Endgame Difficulty

A quick thing before we dive in.

Okay so Mayhem 1 through 3 is the entry level tier where enemies gain +50% health and damage and loot quality increases slightly, it's best for first-time endgame players transitioning from TVHM and your story completion gear works fine here so just keep your kit within 2 levels of your character and you'll be okay, I started on M1 right after the campaign and honestly it wasn't that bad. But then Mayhem 4 through 6 is the mid range where enemies gain +200% health and the damage gets kind of spicy and this is where Mayhem-exclusive weapons start dropping, certain legendaries literally cannot drop below Mayhem 6 so if you're farming for a specific gun and it's not showing up check if it has a Mayhem requirement because I wasted like 5 hours farming a boss for a gun that only drops at M6 and I was on M4 the whole time. And Mayhem 7 through 10 is the true endgame where enemies gain +1000% health and +500% damage at M10 which is honestly insane, only optimized builds survive and you need a full build with perfect class mod and artifact plus Mayhem 6 exclusive anointments. But here's the thing nobody tells you, Mayhem 10 and 11 have the exact same loot quality and M11 just removes all modifiers so if you hate the random modifier system just play M11, you get the same drops, same XP, same everything minus the annoying stuff like floor is lava or enemies reflecting bullets. Because the community generally agrees M11 is the way to go for farming and I definately prefer it because I got tired of rerolling modifiers every five minutes and you get the idea, it's just way less annoying. So don't waste time on M10 if you don't have to, M11 is the same loot with none of the headache.

So the S-Tier modifiers that you should always reroll to include Lootsplosion which makes enemies explode into loot on kill and it doesn't affect combat at all while giving you free stuff, Speed Demon gives bonus move speed with literally no downside and I love this one ngl it just makes you faster and who doesn't want that. Healy Avenger spawns healing orbs when you kill enemies which is more survivability with zero downside and on Mayhem 10 survivability is everything. Big Kick increases your knockback but also reduces enemy bullet spread by 40% and that reduction is actually a buff disguised as a penalty, it's kind of a trap because it looks like a debuff but it's secretly amazing. For A-Tier modifiers that are acceptable, Freeze Tag freezes nearby enemies on action skill which is free crowd control, Buddy System makes enemies friendlier and they take bonus damage, Post Mortem makes enemies explode on death which is free AoE damage and you get the idea. And the F-Tier modifiers that you should reroll immediately include Floor is Lava which puts a constant DOT on the ground and makes some boss arenas nearly unplayable, Drone Rangers spawns invincible drones that harass you constantly and I honestly hate this one more than anything, Ranger makes enemies far away take 50% less damage, and Not the Face gives some enemies headshot immunity which is just cruel for crit builds. Reroll these immediately, it costs a trivial amount of eridium at the Mayhem console on Sanctuary and don't suffer through bad modifiers out of laziness or whatever.

Also a heads up.

A lot of players finish the campaign and think they've beaten Borderlands 4 and that's cute but the campaign is the tutorial and Mayhem Mode is where the actual game lives, the loot gets better, the enemies get smarter, and your build actually gets tested in ways the campaign never does. I remember my first time jumping from normal to Mayhem 1 and getting absolutely wrecked by basic mobs and it was humbling, like genuinely embarrassing how fast I died, but that's the point because Mayhem forces you to engage with BL4's systems in a way the campaign never does. So you can't just point and shoot anymore, you need element matching, anointments, a coherent build, and actual game knowledge, and the rewards scale with the challenge because Mayhem 10 weapons have like 2.5x the base damage of their non-Mayhem versions, anointments get better rolls, dedicated drops become more common, everything about the endgame economy is tied to Mayhem levels. And if you're not playing on at least Mayhem 1 after finishing the story you're literally leaving damage on the table and loot in the boss's pocket which is kind of silly when you think about it. But the jump from M0 to M1 is free power with very little added difficulty, there's zero reason not to do it and tbh I didn't turn on Mayhem for like two weeks after beating the campaign because I was scared and I really regret it now. The difference in loot quality between M0 and even M1 is huge and your build will feel so much stronger with Mayhem-scaled weapons even though enemies have more health, it's counterintuitive but the gear outscales the difficulty increase and definately enable it as soon as you can.

So here's the breakdown that the game doesn't explain well and I had to learn this through trial and error and reading Reddit at 3am. So Mayhem 1 through 3 is the entry tier where enemies get about 50 percent more health and you get a small loot quality bump, your story-completion gear works fine here and you shouldn't be scared to jump in immediately after the campaign ends. Then Mayhem 4 through 6 is the mid tier where enemy health scales to about 200 percent bonus and the damage they deal gets spicy, this is where Mayhem-exclusive weapons start dropping and certain legendaries literally cannot drop below Mayhem 6, if you're farming for a specific gun and it's not dropping check if it has a Mayhem requirement. And Mayhem 7 through 11 is the true endgame where enemy health hits 1000 percent at M10 and damage gets genuinely ridiculous, only fully optimized builds survive and you need perfect gear with perfect anoints and a well-planned skill tree and you get the idea, it's the real endgame. But here's the thing nobody tells you, Mayhem 10 and 11 have the exact same loot quality and M11 just removes all modifiers so if you hate the random modifier system just play M11, you get the same drops, same XP, same everything, minus the annoying stuff like Floor is Lava or enemies reflecting bullets. And the community generally agrees M11 is the way to go for farming because the modifiers were a cool idea in theory but in practice they just add frustration to an already difficult game mode. Also definately skip M10 entirely unless you enjoy suffering for no reason, M11 is just better in every way that matters and I'm pretty sure most experienced players haven't touched M10 in years.

Anyway here's the deal with modifiers.

If you're playing M10 with modifiers instead of M11 you need to know which ones are worth keeping and I've tested pretty much every combination at this point. Lootsplosion is the holy grail because enemies explode into a shower of cash and loot on kill and it doesn't affect combat at all while giving you free stuff, it's literally just free money and eridium falling from the sky and stuff like that. Speed Demon is the second best, bonus move speed and the modifier literally has no downside, it just makes you faster and on big maps like Nekrotafeyo you really feel the difference, I can't play without it anymore ngl. Healy Avenger spawns healing orbs when you kill enemies which is more survivability with zero downside and it's basically a free healing skill on every character, probably the best defensive modifier in the game. Big Kick increases your knockback but also reduces enemy bullet spread by 40%, that reduction is actually a buff disguised as a penalty and your effective survivability goes up because fewer enemy bullets hit you which is honestly kind of broken when you think about it. Post Mortem makes enemies explode on death which is free AoE damage and it chains through groups of trash mobs in a really satisfying way, I love watching the chain explosions and etc. The ones to absolutely avoid are Floor is Lava which puts a constant damage over time effect on the ground and makes some boss arenas nearly unplayable because I've died to Floor is Lava more times than I've died to actual bosses and it's infuriating. Drone Rangers spawns invincible drones that harass you constantly and there's nothing you can do about them, it's the worst modifier by far imo. And Not the Face gives some enemies headshot immunity which is just cruel if you're running a crit build and you'll waste so much ammo shooting immune headshots. Reroll immediately if you see these because it costs a trivial amount of eridium at the Mayhem console on Sanctuary and don't suffer through bad modifiers out of laziness, I spent like a week playing with Floor is Lava because I thought rerolling was expensive and I still regret those hours.

The classic mistake and tbh I did this exact thing is jumping from M0 straight to M10 because you saw a YouTube video of someone melting a boss, but your M0 gear does basically nothing at M10 and you'll die to the first basic mob you see. You need to climb gradually, go M1 first, farm some M1 gear, then M3, then M5, then M8, then M10 or M11, each tier gives you gear that makes the next tier manageable and it's a smoother experience than getting one-shot by everything on M10. Second mistake is not understanding that Mayhem levels affect action skill damage because some skills scale with Mayhem and some don't, Iron Bear scales, FL4K's pets don't scale as well, so test your build at each level before committing. Also don't assume your M0 build will work the same way at M10 because it definately won't. Third thing, people forget that Mayhem modifiers reroll every time you load into a map so if you get a bad modifier set just save quit and load back in, it costs nothing and takes like 10 seconds, it's literally free. And the biggest one I see is players who refuse to use the Mayhem reroll machine on Sanctuary, it's right there and you can set your modifiers manually, there's no reason to play with bad modifiers when the console lets you pick good ones for a few eridium. Also people jump to M10 before they have the right gear and then complain the game is too hard, like yeah no kidding, you're using M0 weapons against enemies with 1000% more health, what did you expect. And for the love of loot check if the gun you're farming has a Mayhem requirement before you spend hours farming it on the wrong difficulty level, I've made this mistake multiple times and it's so frustrating when you finally look it up and realize the gun can't even drop at your current Mayhem level and you just wasted 3 hours of your life.

Here's the optimal climb most experienced players use and I wish someone had told me this when I started because it would have saved me dozens of hours. Finish the campaign, immediately set to M1, farm a Hellwalker from Road Dog on M1 because that gun alone can carry you to M4 with no other gear changes and it's honestly the most efficient way to start the Mayhem grind. Then at M4, farm a Monarch from the Valkyrie Squad because that carries you to M6 and the Monarch on M4 is still stupidly strong, probably the best all-around weapon for climbing Mayhem levels. So at M6, farm dedicated Mayhem 6 exclusives like the Re-Volter from Sumo because that shield carries you to M8 and maybe even M10 if you have a good build, it's kind of ridiculous how much power that shield gives you. And at M8, switch to M11 and skip 9 and 10 entirely, then farm your final build on M11 with no modifiers, this entire climb takes maybe 4 hours if you know the routes and definately less if you get lucky with drops. Another tech, action skill start anointments become available at Mayhem 6 and they're the best anointments in the game, don't farm for perfect anointments below M6 because the ASS prefix literally cannot roll and you'll waste hours farming for something that doesn't exist and you get the idea, it's like fishing in an empty pond. And the secret tech for boss farming, Mayhem levels persist through save-quit so you can set M11, kill a boss, save quit, and the boss respawns at M11, you don't need to re-enable Mayhem each time, the game remembers and it's a small quality of life thing but it saves seconds per run and those add up across hundreds of boss kills and etc. Also if you're struggling at a particular Mayhem level just step down one level and farm there until you're comfortable, there's no shame in it and the loot quality difference between M10 and M11 is zero so you're not losing anything by taking it slower. One more thing I discovered, the Hellwalker at M1 with a good anoint can actually carry you all the way to M6 if you build around it because it's just that strong and I'm pretty sure the damage scaling on that gun is bugged but I'm not complaining, it's kind of a hidden gem for Mayhem climbing.