dont leave it too late to do the instances or they wont present much of a challenge!
even 5 ilevels makes the difference between the seemingly impossible and the doable in my experience so far.

My aim is to finish each heroic at the lowest ilevel possible. after that there's just no point in running them as the gear is crap i630 and all the GOT(gear over time) stuff supercedes it by miles.(classic hyperbole i know..)

Did someone mention war+4sham !!! thats on my shortlist for my next team tell me more!