I'm going to disagree, I think a good voidwalker is more valuable than self rez. I'd rather never die thanks to vampire build, than have to rely on my super to get back up all the time... COE back around April really showed how absurdly powerful voidwalkers were in pve. as long as there are lower tier ads like Dreggs or vandals you get infinite grenades, that heal you on kill. it's basically like being mid radiance, but with health regen and a panic super to deal with pesky yellow bars.