Took like 4-5 real practice runs to get here. Some advantages: Healing fams, 10% crit dmg, boss buff from night troupe, punch king/toben buff. I think I could've cleared without them. See end of video for legion
Main tips :
1. Dodge all purple balls as they remove your moonlight
2. Dodge all of Will's main attacks
3. For P3, dodge, but also dodge well enough to get two bursts in. Then after that, hold your lives till he casts poison. You can also use Resistance Link to buff, and then swap to a KRR ring for your last burst.
00:00 Buffs
01:07 P1
11:06 P2
18:53 P3
25:32 Gear