I'll have to agree with Silencer. I've completed ramps and bf since my original post. So far, I haven't had the need to respec a shammy to heal.

My problem was in how I healed my pally. I had been using a macro where all of the shammies cast lesser healing on me at the same time. I found it better to have just one shammy throw a bigger heal on me, while the other shammies continue throwing lightning bolts. Every time I press the key, a different shammy would heal so the mana usage would be balanaced out. I would use the all shaman heal in emergencies.