Heroics: possible with non-traditional setups?

[Mendicant]

I know most can be done with 5x shammies, and I know pretty much all can be done with a paladin+healer+dps setups.

Will any be possible for a 4x warlock, 1x priest (healer) setup?

Edit: The whole reason I ask this is because I want to be really effective in BGs/Arena while not crippling myself in PvE.
I just had an additional thought:
Maybe I could do 3 warlock, 1 paladin, 1 priest. For PVE spec prot pally and holy priest. For PVP spec holy pally and shadow priest. Thoughts?

[FunkStar]

The last could work, with a pala tank, but 4 locks 1 priest is not gonna work in 90% of the heroics, since the warlocks are just too squishy, and you cant kite everything.

[HPAVC]

I do 4 modfied SLSL spec warlocks and a CoH/IF Priest. I really depends on your gear how easy the instances are. If your heading into instances wearing PvP gear I would think your times would be quite rough even non-heroic. Speed running through normals would be a good test.

My advise is to get good at the turn over from one mob to another and learn how to stop overkilling mobs and quickly start draining down new ones quicker and quicker. Maximizing the trickets and keeping the succubus sacrificed as much as possible (damn wotlk will nerf this)

As far as the priest goes, keep up the mending, use coh (with your gear it will be quite powerful), and get a rythem build for tapping and healing to maximize your mana / threat. You will do good to make a view of your party in a emergency monitor that shows when all 8 characters are at the normal CoH and PoH ranges for you.

My game completely changed when I got a few raid pieces for my guys, 2 pcs of corrupter x4 and 2pcs of absolution would be obvious. items like a piston and what not that proc off your aoe heals for free are must haves. Just buy raid slots to get them imo and be done with it. Obviously Crystal Spire of Karabor would be another example.

Remember you will loot so much crap that you could almost support a server itself with enchantment and tailoring mats, so getting a nitche item is nothing. Once you start getting tokens regularly your all set.

During the start I geared my MT lock with pretty much all rare +stam blues (pretty easy to find, just keep your eye open for them), enchants and leather working patches to get maxed out. The other locks are classic epic tailoring gear until recently.