Originally Posted by
Lightmayo
I echo all the previous comments about corrosive damage and ever tumbling stone. I main a MW but for quests/Torghast I play WW, so I am not inexperienced but it isn't my best spec. I was able to solo all 8 layers at about 200 ilvl. I found two combos that worked the best and trivialized everything past layer 12. The first is corrosive damage, ever-tumbling stone (plus all the roll charges) and that power that gives you a +15% damage boost per floor (at the expense of 5% health). The second is corrosive damage, +stat modifies (that 15% stat one, 30% but can't walk backwards, etc), ever-tumbling stone and the Necrolord bonedust brew power where it increases brew damage by 1000%. Things just explode instantly with this build. I killed the last boss of layer 8 with 14 million health in less than 5 seconds.
An off-build would be to get your health as high as possible and then get the touch of death adds 5% to fortifying brew health boost. I had 1.4 million hp at the end of my layer 7 run with FB activated.
One thing I found extremely helpful was resetting the instance until I got a good starter zone. So no starting on the mobs have +health/damage zones. I even reset for the fire zones since you have that dot for all 18 floors otherwise.
Good luck to all those still attempting!
ETA -
Also, being smart with how you use your ravenous anima cells. Obviously you want to get the one where skeletons drop 10x more phantasma but there are two mobs (archers and interceptors) that give you 10-30 soul remnants. I was almost always at 100+ remnants at the end of my runs.