yeah what talos said. MgT is pretty tough to do, with lots of big pulls. with my current group (1 pally 3 shamans 1 preist) I have a lot of trouble doing the 5-mob pulls. The 4-pulls are a lot more doable.

My typical rep-farming run is, run in, do the trash and 1st boss, then there is a few quick aoe pulls (these are EASY with paladin tank) and then 2nd boss. Then run out and reset.