I'm a real Whorelock.
I main Sunsinger and Purifier Robes. Flame shield is better than life steal. Firebolt grenades are better than scatter grenades unless you have The Nothing Manacles. The Claws of Ahamkara give you a second melee.
The Purifier Robes blind enemies when you self-res, and that makes Sunsinger pretty viable in PvP (I guess you haven't figured it out yet), but it's really all up to the user. Whenever I raid, people always tell me to run Sunsinger.
I love my wings of fire. I love Angel of Light and being able to run around a corner and stay in the air long enough for the enemy to think I'm gone -- just to drop down and shotgun them to oblivion. Yes, Nova Bomb and Stromtrance are much better supers, but I save my super for when I actually need it.
Oh, and trust me, I can stay alive long enough just like the rest of them.