Iv'e discovered there are supers for PvP and those for PvE. For ex. A titan as you know has the defender sub class along side the striker sub class. The defender is crap in PvP, while in PvE you provide an area of sanctuary while enemies blast the living ____ out of your shield. I haven't played as a warlock so I can't provide accurate accounts of their supers. During Beta I played as a Hunter. While I didn't use blade dancer, Beta being the reason, golden gun is great at eliminating VIP targets in PvE, while blade dancer is great in PvP, because you one shot kill melee everyone and move super fast. It's mostly in my opinion based on what your playing.