My guild downed this last night using 1 warrior tank 2 priest 1 Disc 1 Holy, a holy pally and healing shammy, the rest of the raid was fill with ranged dps and this boss was cake. we had been wiping over and over for the last two weeks trying to get this down with two tanks. we stumbled onto this strat when one tank died the other picked up both trons and we keep going doing better with a tank and two dps down. Found it is a lot better to having all the fire beams and ads coming from one place instead of two. People were able to get out of the group and not get anyone else killed just tanked all the trons where they sit in the room. We may have had a little bit of over kill on the healing we might try 3 healers next week just to see what happens if anyone else is having trouble this might help you out. Give it a try.