Ok, your absolutely right... Sliver Armor counst as AoE-damage. Just did a run using this build: OgNDgWy8SSfaDfVlC0CsCulyDA
It's a sort of a combination of degeneration (which is AoE) and single target damage. I had the same amaount drops on the right group (-3 remaining) as if I had made a full run with Sliver. Could have done the whole run, but my pizza was ready to be eaten, and I didn't want to burn it.

I think it's a little bit faster then your version, because the things are really just about dead, when you stone them... but BEWARE THE VENGEFUL WEAPON!
Hey btw., this is the kind of discussion I want to see on the forum...
Take care!
MH.
EDIT: I posted the wrong build by mistake don't use Stoning, use Stone Daggers!
EDIT2:
Did a full run now with the build above, I had 26 drops overall. 3 purples, 1 lockpick, 7 (!) destroyercores, and one ritualist tome... well, now the bad part... it takes about 20minutes... :-/