With BG's as the focus...

[Ualaa]

Which would you do?

a) 5x Affliction Warlocks.
b) 4x Affliction Warlocks + 1x Discipline Priest.

[Coltimar]

Option B and drive with the priest is what I would do. I am more of a defensive minded person than an offensive minded person. The heals, the cleanses, the buffs. There is something to be said for watching your enemies collapse in a heap as you crumble yourself. Grim satisfaction.

[shaeman]

4 warlocks and a disc priest. The priest would add psychic scream (instant howl of terror equivalent).

I'd also give destruction a try - not as mobile as affliction, but imagine 5ximmolate, 5xconflagrate and 5x chaos bolt for massive damage.

Probably need innerspace or something to use shadowfury on round robin.....

[Kedash00]

i agree, B also
Heals > more dots
if you can't heal them then you are gonna get one picked off and then be down a lock anyways, if not more than one, i'de never run a group in pvp without a healer

[heyaz]

Add priest
If you decide you don't want the healing, you can go shadow.

[daviddoran]

Priest. Anything to be able to remove all the various annoying buffs/debuffs. Mass Dispel a pally bubble, then pew pew.....

[Mokoi]

4 shadow priests and a warlock.

Spriests got huge buffs this next patch, and should provide tons of passive healing. You can run them as affliction locks, with the benefit of having ridiculous heals on demand as long as you have mana.

I have priest teams and warlock teams, if you want to use dots, go priest. if you want burst, go destro locks and a disc priest.

[Ualaa]

I've already got 5x Priests at 60th.
They are currently Disc, but could go Shadow quite easily.

I went with:
- Anthràx, Blood Elf Priestess
- Ebolà, Blood Elf Warlock
- Malarià, Blood Elf Warlock
- Cholerà, Blood Elf Warlock
- Diphtherià, Blood Elf Warlock

They have formed the guild <Pestilence>.
They will eventually BG, as an off-set of sorts, on my same server.
I'm in the process of transfering gold, via the neutral AH to cover their expenses through slow flyers.

I'll level/gear them Destruction, but respec to Affliction once they're half geared and close to 80th.