3 rogue 2 healer combo

Yesterday i came up against a team of 3 rogues, a pally and a priest. With blinds and stun locking my healer went down quick and i think this was the primary reason i lost. I managed to take down the healers at the same time my healer went down leaving me on my 4 shaman with 3 rogues to deal with. (this is never really a problem in BGs, they are never this organised) Unfortunately they had me beat, my health and mana were getting low and with them stunlocking me like crazy with blinds going too i went down pretty quick.

How do you combat this sort of team? Any hints greatly appreicated.

Im expecting "dont let your healer die", to be the main response tbh :D