Definitely get MoF pets for all your melee (except your tank who should use IG), BU or chilled devil is what you should get for most of your casters with the exception of necro who you should go for chilled devil (unless it's been changed I've heard the proc happens per dot per tick so it's like adding extra dmg to each dot)
Angryface would be better...but through out the rest of the year an IG on ALL your toons is better....because you will use that way more (especially in t10) and by next halloween you should be up to t10 (even if you are t1 this halloween)