if i were u i would just spec prot, get a healer(a druid for motw) and a shadowpriest, and any 2 dps then chain farm normal and heroic dungeons. h mech, h sp, h bf, h ramps, h bot. all can be done in less than 45m.

i did just that to farm heroics after taking a break from the game and i got ard 500 bojs in 4 weeks. gl