Prot Pally/Holy Priest/ 3x warlocks ; Which Pets?

So i got my first team Pally/Priest/3x mages to 80, and relatively well geared, lots of naxx guild runs, and some pugs, so I want to get some more toons up.

I figured the fastest way is to run 3 locks with my existing tank/healer. I can dominate instances with way too much HP and healing for their level. They used to be demo, and 3x felguards would tear shit up, but this time I decided to try affliction again.

I'm all set in that department, but I was wondering which pet setup I should use? I previously was all felguards, and occasionally a voidwalker for an offtank. Right now im running 2 Succys and an Imp (for the buff really) Should i throw in a felhunter? I actually never did that quest (am 73 at the moment, eek!)

Also on my list is to do the questline for the Infernal and the Doomguard, with 3 locks I should be able to have one up for every boss fight easily.