5xDK what Ive done so far:

Gruuls lair
Magtherions lair(spelled correctly?><)
The eye
Scc(Havent killed Vasjh yet, because as a melee team ive failed to reach the tained elementals before they despawned,,,,tried to spread them out.. but then the damn mobs that fears comes and they are chain feared until i have ams up)

Hyjal
Black Temple.
Crusader
OS3D
Eye of eternity
Ruby Sanctum(pre bosses,,last one ...only tried once..and didnt want to try that again lol)
Ulduar(currently 3 bosses left...doing it now )
Onyxia
aq20
aq40

Then the damn ICC..... Ive been succesfull doing achv for mount aswell up to the one boss that is impossible for me to kill... "Valthiria dreamwalker"...
That ofc is a healing fight..and dps controll the adds....I tried to switch one of the dks with a healer(she is 397 geared) but controlling my dks and going in and out of portals.. havent figured out how to controll ar chars yet, as iam a beginner in isboxer.