Well, I did that. Anyways, 

Enemy's hit roll = 16
my dodge roll = 5

Ally's hit roll = 16
Enemy's dodge roll = 6
Ally's attack roll = 3...
that new ally literally reduced that enemy's HP to exactly 0, lol.

Also, healing doesn't usually require a hit die, that is unless you're actually casting it from a distance.

healing roll = 6, so I could have healed 12HP. I only needed 11, so, yeah, full health again. Ah, early healing spells on Lv. 1 characters.