My guild has been trying for weeks now to down the Blood Princes on 10 man. The last time we did it, we one shotted it, but now, for three straight weeks we keep wiping on the boss. The reason is that the person tanking the shadow orbs is getting hit for like 80K, even though he is grabbing the orbs right when they appear. We have a pally tank tanking the other two bosses and the other pally tank holding onto the orbs. We've dodged the vortexs and we keep that one orb floating in the air. I've even made sure to not use my PoM, just in case it jumps to the tank with the shadow orbs and crits, creating a bubble and removing the stacks.