Gone for a very high damage build with the idea of using a lot of poison ability's to give the debuff.
Fire bats is powerful after last patch so no brainer there.
Got hex as I think this is a great CC ability that also has the poison run on it as the spell should be pretty much spam able, so explosions of poison gas yes please.
Then mass confusion for some extra damage % on the mobs as well as % chance they turn and fight.
Wall of zombies for slow
Annoying little fetishs to do great damage and 2 to apply more poison.
Only down side for me on this build is 1 v 1, this seems to preference groups, but hey hopefully I will have a fat barb and monk to meat shield for me in inferno ;)