I wasnt totally sure where to post this but i found a safe spot when fighting prince, you tank him at the far corner and theres a little spot in which the infernals cant get to you along the wall, i think its worth testing out

infernals can drop anywhere, your just better off moving both tank and party away from the infernals.

and also we dont have problems with The Prince,ok sometimes we can wipe,because we have bad luck with infernals,but ok next time will not be like that and he is not going down.In Kara every boss is piece of cake now,so we dont have to worry about

but there is an actual spot where most guilds attack him, its down the left wall where he walks, theres a spot where they don't drop there. either check wow wiki or google screenshots you'l see what im on about

I dont doubt if its true or not.I believe it,what i am just saying that prince is not our priority right now,because we kill him easy no matter what,so doesent matter tbh