Defender Titan isn't much of a healer though, it mostly protects. I think he means we need an out and out class for actually regenerating allies' health quickly and regularly. Borderlands had a character, Mordecai, who sent his super bird flying out and it would steal health from enemies, sending it floating back to him. We could perhaps see a grenade or something similar to a Nova Bomb that seeks enemies, taking their life and returning it to the nearest player. Or even one that simply sends out seekers to the fireteam players, healing them directly.