>>720210101
use reaper style, grab the top left wall, spam r2 to stay on it without jumping. when you get to the last two, you pogo on an enemy after they jump but there is no white AOE going, then back to the wall.
yes, it's a fucking awful fight for the last phase and RNG will just kill you if you do it on the floor. pogo, dash to wall, spam sprint to stay up, repeat.