You can make a good healer out of an Incarnate, thought it takes a bit of commitment to it. Combine these two soulmelds,
Lifebond Vestments - Heal someone while taking half the amount as damage yourself. There's a limit to how much you can do at once (at 6th level it can be as much as 26 points), and the same target can't be healed more than once per hour.
Therapeutic Mantle - Increase the effect of healing spells on yourself. +1 per spell level, +2 per point of essentia. So for the same 6th level Incarnate a charge from a Wand of CLW would heal 1d8+8.
and you get someone who can absorb damage from the party while halving it, then be healed themselves at an accelerated rate. If you want true self sufficiency you can take Mage's Spectacles as a third soulmeld to get UMD +10 and wave the healstick yourself.