I've read alot of guides regarding healing as a shaman, but I guess my situation is a little different. See, people everywhere say stack haste haste haste because they spam chain heal in 25 man. I'm at around 1000 haste now, with about 300 mp5 unbuffed, 32% crit unbuffed and around 3.3k spell power.
As a tank healer though in a 10 man, is haste really all that good over a point? My LHW is more or less at a second now, I usually need at least one innervate per heroic ICC fight (well, with 3 druids they are handed on a plate). It's also a little awkward as I swap around alot. This week our resto druid will be out of action thus I will be the raid healer. Normally I tank heal. Though, on nights when we have enough healers, I dps as elemental. Some of my gear is shared between both, so it's hard to know how to gem my gear really. I'm mainly gemming for haste, with alot of sp/haste gems and the odd sp gem. But my mp5 is bugging me despite my RL telling me not to worry about it.
Is there a set rule across? Or should I just go with the flow regarding my situation?