I'm using a shaman with 4 hunters and it's not bad at all. I run a spot heal build, which is just healing totem (on CD) -> Riptide -> Healing Surge -> Healing Surge -> Repeat. It really is easy, but be sure you refresh your Tidal Waves buff x 2 from Riptide.

An alternative that would be even easier but potentially mana intensive (talent for it) is drop healing totem on CD (constant uptime), chain heal, then spot heal as needed, or just keep chain healing. Since you're closely grouped 90% of the time chain heal and your totems are OP.