In dungeons blues I'm mana starved alot with a rjuv on tanks and r3 HT on raid/tanks with regrowth and NS HT r10 for big spikes, basically i spend all my time casting, zero time for the 5 sec rule.  I want more mana/regen from better gear but the MC drops are mostly meh, happy with my 500 odd healing and chugging those mana pots!  How do things change in BWL?