Some groups you just gotta know how to let go.

When I was leveling AST up, I had a pretty bad group setup for stone vigil as well. It was a DRK tank, and 2 MCH dps, along with me.

The first pull took 10 minutes to down, and i ran out of MP by the end of it. The tank couldn't hold aggro on more than one thing for very long. Every time i'd cast any heal he'd lose aggro on something. I could overlook this if the dps was okay, but it almost felt as if they weren't doing anything. In the large room a short ways from the beginning, we hit a wall, the tank kept pulling too big, and i couldn't keep up with him. His health was going down faster than i could spam Benefic 2, not to mention that the dps and I were also taking damage due to his inability to keep aggro for more than 2 seconds.

I can't help but feel i could have done more for that group if i were any other healing job than AST. Either way, i politely explained why i could not stay in that group, and bailed.