I see a lot of people saying they wish they have flawless raider but they're not good enough to do it. Well I'll try my best to help you get it by yourself. You'll be soloing Crota's end without dying. I'll explain how to do every part with a hunter and if anything changes for warlock/Titan that'll be under the hunter part. If you haven't solo'd crota before or haven't even done the raid you'll want to finish it a few times before attempting flawless raider. There's a video at the end because some things are just easier if you can see them.
(this is just how I did it, if it's not the easiest way please don't shoot me.)
Part 1: The abyss
Loadout:
primary: anything works, mida is the best option because extra agility.
special: any sniper works
Exotic armor: bones of eao
subclass: anything works, definitely max out agility.
You'll spawn in at the edge of the hellmouth. There's a big platform in front of you, step on it and wait for a bridge to form above the hellmouth. There's a hole at the end of the bridge, jump down. You'll land in the abyss, a dark place full of lamps. If you step into the darkness you'll get a debuff called weight of darkness, this buff stacks up to 10 times. If you have 1-9 stacks you'll be unable to use double jump or anything like that, shadestep also won't work. If you're at 10 you'll also lose the ability to sprint. Standing next to a lamp will activate it, though it will explode after about 40 seconds, killing you if you're close. If you stand next to an activated lamp you'll lose 1 stack of weight of darkness every 4 seconds. Usually you'd just run through here fighting waves of thrall and activating multiple lamps to make sure you can still sprint, this is very hard by yourself. Instead we'll be skipping most of the abyss thanks to a rock next to the second lamp. Just run forward, activate the first and second lamp and jump on top of the rock next to it (definitely watch video for this). When you get on top of the rock you'll want to make sure you still have around 3 stacks left, when you're about to lose your last stack you want to sprint towards the wall and jump up there. If you're very close to the edge but didn't make it you can pop your super to get up there. Once you're up you can follow the edge, it'll turn to the right, just keep following it. you'll end up at a lamp with a knight and a rock in front of it. activate the lamp and hide behind the rock until you lose weight of darkness. If the knight sees you just kill him. After that go to the left and follow the lamps until you see a big plate (like the one in the beginning) and a lamp in front of it. Activate the lamp and just wait until it explodes. Then step on the plate and jump on the rock on the left of the lamp. This will stop lots of adds from spawning. (probably best to watch video to make sure you get on there) Look at the lamp in front of you, an ogre will spawn behind it, kill it with your sniper. Then wait until the bridge forms behind you, you'll lose weight of darkness. Run into the light and you're done with the first part.
Warlock/Titan: Same thing except you'll probably need your super to get one the ledge, use fist of havoc and radiance for that. Use whatever jump would get you higher.
Part 2: The bridge
Loadout:
primary: anything works, mida once again best option because extra agility.
special: sniper
heavy: rocket launcher
exotic armor: bones of eao
subclass: Use triple jump, so no bladedancers
Walk to the plate, stand on it and run back to the stairs behind you. A major knight with flames on him will walk out of the door in front of you, kill him and pick up the sword he drops. Turn around and jump on a ledge next to the totem (definitely watch video). Look at a pillar with the crota logo at on the left on the other side and jump. Get as high as possible and start spamming R1. Turn to the right once you're above where the bridge would be, keep spamming R1 and you should make it. Quickly kill the blue knight with your sword and hide behind a small pillar on the left side of the bridge (video). Hide back there and kill as many enemies as you can, focus on thrall because they're the most dangerous to you. Eventually 2 major ogres will spawn, one on the right and one on the left. Kill them with your sniper and you're done. All enemies will despawn and the door in the back will open up. You'll see a hallway full of thrall and two shriekers. You'll have to kill the shriekers to destroy shields behind them. Destroy the first shrieker with your primary, then run away to avoid the explosions it releases when it dies. Shoot a rocket at the second one, go invisible and run to the end of the hallway. Jump in the hole and you're done.
Warlock/tiran: Nothing changes for Titan, for warlock the jump with the sword may be hard to do, I recommend you watch someone else's video about it because I have no tips for that.
Part 3: The Deathsinger
Loadout:
Primary: anything works, bring a universal remote in case you don't have special ammo
special: any good PvE shotgun, full auto helps a ton
heavy: rocket launcher
exotic armor: celestial nighthawk
subclass: gunslinger
The encounter will start once you step outside, so wait inside for your super to regenerate and pop a heavy synth if needed. If you don't have special ammo grab a universal remote. When you start the fight a 3 minute timer will start, when this timer ends you'll get a debuff with a 30 second timer next to it, kill the deathsinger before this ends or you'll wipe. While you have the debuff the deathsinger won't move and take extra precision damage. As soon as you walk outside, turn left and run into the corner (video). Jump up there and follow the wall until you see a door, go in. You'll see a shrieker and a shield with 2 major wizards and the deathsinger behind it. Run forward until a wizard comes out and kill it with the shotgun. Then jump back and shoot the shrieker with a rocket. Get out of there as fast as you can and go to the broken structure in the back. Reload your weapons and heal. Run to the door on the other side and repeat that. Once you're back on the broken structure you want to go back to the door you just came from, pop your super and kill the deathsinger with the golden gun shot. Get out and once again go to the broken structure. Now you'll have to kill every add, definitely the major knights. Don't stand next to the crystal where the deathsinger was while doing this because you'll start the next fight. Once everything is dead you're done with this part.
Warlock/Titan: same thing except killing the deathsinger will be harder. Use your shotgun or a gjallarhorn on it. Hammers or nova bomb are a good idea too.
Part 4: Crota
Loadout:
Primary: anything works
special: shotgun, full auto also helps here
heavy: gjallarhorn
subclass: doesn't really matter, tether is useful for the swordbearer though
exotic armor: I found bones of eao to be useful for getting on Crota's platform but this is completely optional and won't help a lot.
Before you start go down and look at the two rooms at he left and right, you'll use these in the fight to make sure you don't die.
Stand next to the crystal in the middle to start the fight. You'll get a debuff which stops your health from regenerating, don't worry about this too much. After a few seconds the walls on your left and right will disappear and you'll be able to kill the adds, kill them all. There's 2 knights on every side so watch out for them, they won't come near the crystal. One everything is dead go outside and down to the middle. You'll see a tiny platform with something glowing above it. Grab the glowing thing and stand on the platform. Your health can regenerate again now. A swordbearer just like the one on the bridge will come out, kill him. You can use your super for this. Grab the sword and stand on the rock to Crota's right (Video). Shoot two rockets at crota, as soon as you fire the second rocket you'll have to grab the sword and hit crota 3 times with the R2/RT attack. If you manage to attack 4 times, that's very good. If you only hit him twice, well that's not too good but not a huge problem. He'll get his shield back and kill you in one hit if you don't get out of there. If you're fast enough you can make it back to the rock, reload gjallarhorn, get him down again and kill him right there. If not you'll have to go to one of the two rooms (video) you looked at before. Crota will now move somewhere else and thrall will spawn. Kill the thrall and wait until crota is back to his original position. Kill the swordbearer again and finish off crota. You should have the trophy now, if you didn't die of course.
If you only hit him twice with both swords you'll just have to repeat everything a third time, though now an ogre will spawn in both rooms so you'll have to kill those.
Warlock/Titan: nothing changes
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I've Soloed Crota s end Flawless like so many times