Its not always the saintly good types that have forms of healing and Im sure the function of witch doctors in tribes was to heal people.I think usually they make a concoction that they apply to a wound with a leaf or something.
I mean rather than have some overpowered healing spell he could have some steady over time healing like Paladins pray but applied to players individually and for a fixed duration.He could have something he applies that give temporary life leech to players a bit like reverse lifetap but not as over powering(as low as 3%).He could have a healing cloud that you have to walk into to get healed and only last a short period.Healing could just be something conveniant between fights rather than in the midst of battle to prevent its abuse(Slow animation slow application etc).
I wouldn't mind some kind of healing, though I think it'd be much more flavourful and interesting if it related directly to combat and was a kind of 'dark' healing - something like Soul Harvest, but with life instead of mana.
I'm not a fan of the idea of having healing outside of combat, because I feel that as it is, downtime is attempting to be kept at a minimum in D3, and the skill would end up being pretty useless.
It's nothing like the Nerubs ultimate. It's single target spell that "leaps" from the victim to another enemy if it's nearby. For an this kind of spell to heal also, it would be pretty imba. You also can enchant your mongrels(summons) with this spell just by casting it on them.
You're talking of some different , nerfed healing for the Witch Doctor , unlike Paladin's Healings.
Here's a comparison:
In AoE2(TC) the Monk unit was able to use Automatic , Ranged , No-Delay , Infinite Healing upon Injured Unit (obviously) which was extremely cool.
In AoE3 the Priest unit was able to use "Bandage Healing" that can affect a Group of Injured Units over some short time but is Non-Ranged , Delay-having and Non-Automatic which is quite stupid.
Witch doctors were people that treated ailments, or healers. So it only makes sense to give them a healing spell...and for that matter makes no sense at all to call the class a witch doctor without one.
The witch doctor's healing spell should heal others, not himself.
I see it as a powder or something of that sort that he throws on allies granting them something similar to the d2 necro's life tap for a short period of time.