Belf team composition

[Ualaa]

Your last team can work.

A Pally tank is by far the easiest to box with.
If you're set on DK-Tank and Pally-DPS that's fine.
I'd personally swap the two, and go Pally-Prot and DK-Blood.

The warlock is easy to macro ranged dps.
I'd take a druid or shaman over a mage, but with a BE only team neither is an option.
The mage can go Frost for replenishment and macro ease.
Or go with Fire (will need something like MSBT to announce procs).
Or Arcane which is easy to macro too, but is a mana pig.

The priest will easily heal either melee as tank and the other as DPS.

[Drommon]

Come to think of it... I may have to use a pally for the tank anyway. The DK would be great for dps and to use as an off tank. I kept thinking i wanted to pull with death grip. You know there are cases where you want to do that. If I used targettarget on my priest either the pally or the DK will get healed if they pull aggro. So I can liken this setup as having 2 tanks and just use the right one for the situation. The pally I can spec prot/ret and the DK blood/frost. And just switch as needed. You cannot switch specs in BGs but you can in instances. Hmmm, I am liking this idea a LOT

Drommon