I'll be interested in how you do prince. I used to tank him on the far wall where a notch was on the far corner from the entrance, and the raid would stand on the far wall near the building, we had a really low chance of getting infernals that would interfere that way. Then , a couple patches ago, it all changed and when we tried it , we would get infernals that would drop right on my spot, and the raids spot. It seems blizz wants it to be a fight where you need to move the raid around. However, we were able to do basically the same thing at the door. Raid stands in the door, tank on the wall just down from the door, seems like a perfect multi-box set up where all your dps is ranged from the door, we hardly ever got infernals there, so it might be worth a shot starting from there. PS, good luck, I know as far as infernals go, you'll need it. Doubt you will need it skill wise, looks like you have that under control