Borderlands 4 Endgame & Mayhem Mode Guide 2026: M1 to M11 Progression, Best Legendary Farms & God Roll Targets

I jumped straight to Mayhem 10 after beating the campaign because I had a good build. I couldn't kill the first trash mob. M10 is not "harder campaign" — it's a completely different game where white guns are literally unusable. Here's the proper progression.

Mayhem progression: step-by-step

Step 1: Beat campaign on Normal. Turn on Mayhem 1 — M1 adds +20% enemy health/shields but enables ALL world drop legendaries. Farm M1 for 2-3 hours to build a legendary loadout.

Step 2: Jump to Mayhem 4 (enemies +200% health, +50% damage). Farm M4 for 3-5 hours. Target: one good legendary per weapon slot, legendary class mod, shield, and artifact. M4-exclusive legendaries start dropping.

Step 3: Mayhem 6. Reroll modifiers to avoid build-breaking ones. Gunner: avoid "enemies reflect bullets" (you kill yourself). Siren: "enemies immune to elemental" = restart. Farm M6 for class mods with +3 in key skills.

Step 4: Mayhem 8 (enemies ~+800% health). If you can kill M8 trash mobs in one magazine, you're ready for M10. Farm M8 for M8-exclusives (Hellwalker 2.0, Monarch X, Recurring Hex Mk2).

Step 5: Mayhem 11. M11 = M10 difficulty with NO modifiers. The tooltip says "rewards are halved" on M11. This is a lie — M10 and M11 have identical drop rates (confirmed patch 1.0.4). Always play M11.

Modifiers: reroll vs keep

Always reroll: Rogue Lite (save/quit on death), Post Mortem (death pool damage), Holy Crit (only crits deal damage), Not the Face (body damage massively resisted).

Free modifiers: Big Head Mode / Galaxy Brain (bigger heads = easier crits), Lootsplosion (crit kills = loot explosions), Healy Avenger (enemies heal allies on death — annoying but ignorable), Pool Party (elemental pools — don't stand in them).

Ideal set: Galaxy Brain + Lootsplosion + Healy Avenger + Pool Party.

Best legendary farms by slot

Pistol: Light Show (Kaos, M6+) — projectiles ricochet on crit.

SMG: Flipper 2.0 (Borman Nates, M4+) — 9 pellets, each chains to nearest enemy.

AR: Monarch X (Killavolt, M8+) — bipod fires 16 shots per trigger pull.

Shotgun: Hellwalker 2.0 (Road Dog, M8+) — guitar riff per shot, highest burst damage.

Sniper: Complex Root (Graveward, M4+) — child projectiles on impact, hits large bosses 6-8x per shot.

Launcher: Backburner (Agonizer 9000, M6+) — 3 lingering mortar rounds.

Shield: Old God (Tyrant of Instinct, M4+) — +20% matching elemental damage.

Grenade: Recurring Hex Mk2 (Sky Bullies, M8+) — 6 homing projectiles, chains between enemies.

Artifact: Pearl of Ineffable Knowledge (Manvark, M4+) — consecutive hits stack 1% damage per hit to 15%.

Anointments per build: Gunner → "While action skill active, gain 100% weapon damage", Siren → "On Action Skill End, next 2 magazines have 100% bonus elemental", Beastmaster → "Under 50% health, gain 150% weapon damage" (you're always under 50% with pet redirection), Soldier → "On Action Skill Start, regenerate 8% magazine ammo/sec".

Don't over-farm: The difference between a "god roll" and "good enough" legendary is about 8% damage. Not worth 30 extra hours. Stop when you have the right anointment and decent parts.

Eridium spending: Class mod re-roll at Earl's Veteran Machine (250/reroll), Anointment reroll (50/slot), Gun Gun (100/shot — only when capped at 10K Eridium).

Arms Race: Best way to farm Plasma Coil 3.0 (M10-capable SMG, Arms Race exclusive). Dedicate 2-3 hours after hitting M10.