you guys are 3 healing a 11 man heroic, which means you arent testing your healers, so they will get lower rankings.
your Hpriest and Rdruid are taking away all the healing that is needed inside the spirit realm. (She is in the spirit realm right?)
i think the most easiest thing to do is to drop a healer, so she can do some more healing.
We are 4 healing Desolate host in a 22man raid