Any suggestion for my next team?

[xandorz]

I am doing druid/priest/mage/warlock/warlock (lvl 46).

I want to replace mage with a warlock at 60 since I think the mage is completely useless for pvp since I use a dot/hot/fear team, to me it feels like I am playing a 4 man team.

What class do you think I should put on each account?

?/?/warlock/?/?

I am thinking about putting a warlock on same account as druid, so I can run 4 warlock 1 priest if I want to (right now I kinda like that druid have things like 2 dots, heals, remove curse, combat ress, motw. Doesn't feel like it is a burden to the team).
I am thinking about putting a priest on account 4 so I can use 2 priest if I want (although they don't work well together so kinda bad) and since priest is good at healing warlocks.

To make it easy to level it might be best to avoid hunter/rogue.
I have a 5 man group of lvl 31 shamans already.

Currently I am thinking about either going for 1 priest + 4 warlocks or a tank+healer+3 dps team (probably 2 warlocks so I can go 4 warlocks 1 priest if I want to).

OR... do you think I can easily power level a warlock? It would kinda have to be significantly faster than lvling a 5 man team, since I can get other benefits of having 5 more characters. I am not sure if the leave group and get full xp works in classic, should probably test it.