Just so people understand, many guilds have finished PoTime now and then gone on to wipe against this guy.
It's not that he's much tougher that stuff in Time, but just that there are a lot of quirks to fighting him:
* He hits for 1900ish and mitigates slow
* He has gobs of HPs even for a god
* He summons mobs that tripple in the 8-900s.
* He changes "abilities" during the fight including becoming immune to melee dmg, immune to spell dmg, etc.
* He procs on your MT a dot that also lowers the MT's hate
But that's all fairly easy to overcome. The painful part appears to be that he only allows 42 people in the raid, and banishes your raid, one person at a time until it's down to that number.