Why bother? The +50 buff you get is still worth it for fun.
The fight is 2-tankable (if your tanks are geared and skilled), so that would definitely be a place to start. It should not be that hard to get people to do this one with you since it's a fun and simple encounter. If it is, try finding some new circles.
I prefer the 3 tank method since Bloodmark is random (at least as far as I'm aware).
And 3 healers was easy in augmented Rakata/stock Black Hole at level 50, so you might be able to duo heal it at 55 (but I haven't done it in a long time).