I used the arc-eclipse, smaw and reverse damage. The first two are too hard to use (that's a lot of 2's) with the dark star, but reverse damage makes sense to use with the dark star. Except most everyone dislikes how easy and overpowered it is, and I hate how I play when I use it ... dug spawns ... sees enemies ... shoots with dark star ... throws rad ... misses ... throws another rad ... misses ... remembers that he has a secondary ... finishes off first enemy and has dark star charge with no rads (or one more with bomb bag) and no primrary perk (that is unless I die and get revived).
The Eclipse was one of the first alternative weapon I really explored, I need to catch up on it. I stopped using it because it was so easy to get backstabs. But the game has changed a lot since then. Its simultaneously become more viable, and more challenging.