Absolutely hilarious implementation. (Tried this in regular runs and the cell was giving 150 Phantasma.. so.. I never did it again.)
Killed him at floor 3 and ran my face against the wall of a boss at the end with 3.5k phantasma to spend. The broker never returnes nor did any of his friends. Couldn't kill the boss in time this way before he one-shotted me with a mere melee hit.
You can do this on floor 15, its worth doing this when you dont have any good options to use a ravenous i would highly suggest doing this. This will let you skip stuff on the last few floors, very helpful especially when doing layer 8 on solo where certain mobs can be extremely deadly and capable of one shotting you.
I've gotten through layer 5 of twisting corridors thus far and I have had to abandon runs because I misclicked throwing my ravenous cells and it just wasn't worth the loss of anima and a useless power; that kinda thing can wreck you if it happens early on. Even then, I have not done it to a broker since the very first time I did it, because you only need to make that horrible, horrible mistake once before it's a panicked reflex.