its a pretty simple fight , the tank will be on the boss the whole time, at one point your dps will be turned into a ghost . At that point spam 4,5 and spam 1 on the boss and he will be down in no time ( if your tank cant pull very much dps it is better to have a dk tank so he can brez you, but if you cant get one the tank could solo the boss from that point it would just go a little slow)
See video