Power affect healing???
 

I've wondered for a long time, but does power affect the heal skill in any way. I guess I would like to know before I invest those points in it...

Do you mean power in skill empowerment? I'm pretty sure it increases the amount you can heal.. if you click the up arrows without clicking confirm, you can see the effect of it by rolling your mouse over the skill icon.. if it doesn't do anything, you won't be able to empower it in the first place.

Yes. Putting points in power will increase the amount your Heal spell will do. For instance, a Heal spell that heals around 900 hp will heal an extra 200~ HP with 1 point of empowerment put in it.