I don't like forcing spellcasters to heal each other all the time, so I use a variant of VP/WP in my D&D games. Critical hits do -not- hit Wound Points directly. Instead, you just lose VP until you're down to 0, and then any damage thereafter goes to WP. Actually, I don't even call them Vitality points. I just use the name Hit Points.
See, with the VP rules, you heal 1 VP per level per hour. This way, even if they don't heal each other, the party will recover within a few hours, usually. You only heal 1 WP per day, though, so if the fight is really nasty, you'll be banged up for quite a while.
I let magical healing heal VP the same way it heals HP. Additionally, for every die of healing, you also heal 1 WP. It works fairly well, and makes the game less reliant on magical healing, letting the spellcasters go nuts. And spellcasters are cool.