You may notice that knights have the same class as gremlins, in terms of weapons, which is swords, handguns (gremlins have flamethrowers instead) and bombs. But, you may also notice that there is one exception: knights don't have healers!
Well, I personally think that knights should have a weapon that heals other knights, or something like that. Maybe the weapon as certain weaknesses, like unable to attack enemies, long charge time etc. to balance out this benefit.
Gremlins have menders, and fiends have silkwings, so why not? :)
Now what do you think about this idea?
We also have friends to revive us infinitely, and no waiting period, we have a massive selection of upgradable armour and weapons, and the ability to change weapons based on the enemy, whereas enemies are stuck to their weapon forever, regardless of the ineffectiveness.
We go against wolvers with massive normal/piercing armour, we can take virtually no damage, while blasting them with DBB/BTB and kill them without a thought.
We're already at a massive, massive advantage. Introducing healers would let us godmode the game, take away the challenge/danger aspect of..everything, and because it would enormously reduce the amount of energy consumed on runs on a grand playerbase scale, I don't see OOO ever allowing it from a purely fiscal point of view, either.