i have a couple of questions, why wouldn't fire shield or thorn carapace work in this deck? it seems like it would kill the aether decks.
and my second question is would it be wise to add arsenic in for the matchs you just don't draw the jade staff? i've done this and it seems to work.
Fire and Thorn would kill the malignant cells and kill the lockdown. The point is to defend against the massive 1 damage pocks, but not to kill them. (This is why Inundation is so great. It leaves the malignant cells alone.)
An Arsenic isn't a bad idea. I haven't tested it, but I figure it wouldn't be any good unless you drew it while you still had ~20 or so cards left if your deck, especially if they had SoGs. So I would either do multiple Arsenics (2-3) or none at all.