My main is a Warlock and I'd have to say roll a Voidwalker it's more fun and that satisfying feeling when Nova Bomb is unleashed, that being said Sunsinger is great to solo Nightfalls and grenade spamming WAS fun (has been nerfed with 2.0). The self res of Sunsinger is great in PVE not so much in Pvp whenever im fighting against a Sunsinger I always do a double Take an easy 'extra' kill as during res in Pvp they are vunerable and both kills count.