[DrKvothe]

Atmas, there's a level range where it's really an issue of choosing amongst buffs when there's just not enough mana for everything. At 29, your healer won't have cheal, so you should regen the tank, puller, and yourself (300 mana every ~10 min). All melee, let's say you've got 3 of them, are going to want quickness if you don't have an enchanter (240 mana ever ~10 min).

You'll be meditating ~12 mana per tick if you don't miss a tick, and you'll be regen'ing 8 hp per tick if you're barb/ogre, 11 if you're iksar/troll. Assuming you take no hits and never cap out on hp, you're getting 20 mana for every 50 hp you regen.

So for a barb/ogre, that's 15.2 mana per tick and for iksar/troll it's 16.4 mana per tick. You tick ~100 times between rebuffs. So for an untwinked shm doing everything he can to max his mana regen, barb/ogre's mana regen is 1520 mana and iksar/troll's is 1640 mana between necessary buffs.

So just minimal regen/haste at lvl 29 is going to take up 32.9 to 35.5% of maximum mana regen (assuming no external heals). No lvl 29 shaman is going to actually hit that 1520 or 1640 mana per 10 min mark, however, and the real number is likely going to be ~50% of mana regen just for those 2 buffs.

People will expect emergency roots and backup heals at least. That's easily most of the remaining mana. Sometimes additional buffs just don't fit the mana budget.