They are both support specials yes. And I don't rely on specials to do my damage in Destiny. It seems mostly for pvp anyway blade dancer and golden gun work best in pvp. The Titan smash as well and bubble. If you are relying on your specials to do your damage in pve, then you are doing it wrong. Especially in raid content. And to answer your question, the revive super is there in case of screw ups or wipes.