WB Deborah: 469k power = 20 million damageTIPS
So this boss will likely give newer players trouble as it both cuts your damage by almost half (good luck reaching 400 kills) and consistently stuns multiple front row units. As one f2p to another, this is a snapshot of my day-1 attempt. Hope it helps. https://youtu.be/ctA6o3oin_M
Side note: I've found dropping Nirrti for Seth didn't decrease my damage significantly (actually increased it on one run). I suppose if you get lucky with rng and have Ophois and F. Sytry applying their effects consistently the boss'll have a low uptime of her buff. Note 2: Swapping Nirrti and Maat's places results in an increase in damage from 5-9 million...I have no possible explanation for this.