My favorite class is the Warlock, although I've been using my Hunter because I like grabbing the Sword (No need to use a Heavy Ammo synthesis or do the Glitch) plus I'm good with the Sword. But as for my Warlock, throughout the Crota fight, I use Voidwalker for both Health and using my Super on the two knights in the beginning for Orbs (which I can't use myself, so I don't really care about using my Super and helping my team out). Yet I feel more confident and play better if I have my self-res, because I know I have a second life, and since I don't die a lot (I don't even use my super in Nightfall, ever) I can just get up close and kill enemies without being worried that I'll die).