Just learned a little something about this fight with Prince that may make it lots easier.  Archivis, on the BroadbandReports WoW forum I frequent, dropped an interesting hint. He's more of a hard core raider and has some interesting insight at times.

He says though the infernals drop randomly they drop in predetermined spots.  He also says their hellfire spells never overlap, which is something I've noticed when we've been in there.  If you take a look at the geometry of non overlapping circles inside a rectangle you'll notice spots you can stand in within the rectangle but outside the circles.

SO, he says it's possible to tank him at the &quot;left wall&quot; in a position where the mt never needs to move.  He also says there is another spot which is safe for ranged to stand at max range, also never needing to move.

Another poster asked him about the melee DPS during shadow nova.  He responded with &quot;As long as melee dps is intelligent about it, they should not have to worry ... Melee runs to the same spot every time and if they die? Who cares. Phase 3 is no longer a DPS race. Only phase 2. When you remove the infernals out of the picture, the fight is tremendously easier.&quot;

He was being a little bit cryptic but mentioned his reason is for fear if the information became too commonplace Blizzard may change something.

http://www.dslreports.com/forum/remark,18587358