if you are set on doing 25 mans, you are going to have to throw some casters in it, most of the fights in wolk had casters doing something, and melee doing something else, in many raids.

Casters are easy though, you can get them all setup and positioned for the most part before the fight even begins, then if you need to move them just /follow then hit your spread out keys and they are set back up. really easy compared to melee in my opinion.

Another way to play if you dont want to be the tank and can't see what's going on, you can have your main setup as say, your main healer, and you can run around and see more of the fight that's going on, and just use iwt for both your tanks, this will give you better perspective on the given fight, it takes some getting used to to play like that, i had alot of success in lower level battegrounds with a shammy+4 warriors and i controled the healer, was when we first got to use iwt but i haven't played with it much since then.
Was really fun though, a different way to play.