Elf-shot for the poison would be thematically appropriate, but elves in D&D aren't very fey. I say stick to "poison".
Does the +2 racial bonus on poison suffice? That sets the DC equal to the arrow storm DC, which I think is mechanically beneficial.
Did we ever decide on the incorporeal vs. gaseous/insubstantial debate?
We still need the create/control aerial zombies ability.