I see. Well, from a healing perspective, you should only be running 2 healers in your 10 man. Three is overkill, a dps loss, a longer transition into phase two and the third healer may not be doing much, which can create problems. A Holy Paladin and Disc priest are a great combo: They can spirit shell during stack points and are great with mobility healing. If you still have problems, tell any shamans in your raid to just drop healing stream, or pop spirit walker's grace and throw off a chain heal or two (although the healing this does is really minimal and only a last minute type of deal). In the mean time, if the druid has a boomkin spec - he can go into spell haste and you can do a different buff for the raid too.
Make sure the entire raid is topped off before running once you hit phase, and make sure the healers are in range of everyone.