Been doing something similar and mixing it up (Leaving the tank out).
So far we've done 3x DPS, 4x Healers, 3x Healers and a couple of mixed ones.
Here's one from last night.

http://youtu.be/ElEZCUWnDSY

So far, Pharos Sirius was the most difficult one, though nothing apocalyptic. Just, not as mind numbing.