Personally I think it's the blade dancer super. I can't even tell you how much that super has killed me every time I play crucible.
-
Gg and blade
-
Every super is very good. Personally, I think the titan bubble is most effective when used well, because if you get enough kills while it is up you can keep a constant stream of bubbles up, and always have a damage boost or overshield.
-
I love titan bubble
-
Whichever one your good with. It's all about playstyle. Every super has the potential to win games with a skilled user.