I did it on my hunter. Abyss, used dont touch me, full agility, mida, invisibility build. This is the easiest part of the raid after some practice, you dont have to shoot anything, just run through going invis as much as you can. When you are at the end, I jumped on the rock next to the lamp, shoot the ogre and wait till the bridge is formed. Bridge: I used triple jump to get to the rocks on the right, you can also build the bridge or use blink to get across, but i prefer triple jumping to the rocks. Then i go to the right side, kill enemies untill ogre comes out on the right, then kill both ogres. You dont even have to kill gatekeeper if you just stay on the right side, he will not walk up the tiny little stairs. You can also camp on the rocks near the doorway to the next part or behind the lamp everyone uses to cheese hardmode, but I think that makes things a little bit harder in this case. The thrall way is kinda obvious, just take it slow. I use this part to get some heavy ammo without using a synth, which allows for another synth on deathsinger without having to wait 5 minutes. Deathsinger: I use bladedancer with high double jump. You can jump up from the corner on the left RIGHT after the doorway (so before the two nights), this saves about 5 seconds compared to taking the stairs. Then go inside using invis after the boomer knight walks outside (to not agro him). Blast wizzard with two ghorns, shoot shrieker with one ghorn and run out. Do the same thing on the right side. Then you can just go in, but you can also wait until she starts her song and then go on the box on the right side, just hit her with BH. Before that, you can clear all the enemies on the right side so they wont bother you. Crota: the strat i use on crota is to use swordbreaker and immediatly rush to the box in front of where the swordknight spawns. Jump on top of the box and throw a nade and blast him with shotgun. I went up to the right rock, shot two ghorns and immediatly after the second rocket is fired pick up sword and run up to crota (pray to the lords wolfpack rounds dont glitch out). Then get 3 or if you feel lucky 4 hits and go back to the right rock. Drop sword and reload ghorn. Down him again and try to get another 3 or 4 hits in. If you repeat this process after crota has rotated back to middle you can kill before ogres, On my flawless run wolfpack rounds glitched out once so i had to do ogres, i switched to black hammer and hide behind the left big pillar at the stairs, kill the right ogre asap and then the left ogre. That was my strat, i preferred using swordbreaker over th BH because you dont really have to worry about swordbearer hiding behind rocks. Good luck!!