I'm thinking of a support role.

What do you think of a healer with a twist?  When he goes to heal someone, whatever is wrong with the target becomes wrong with him.  Say someone has a broken bone, my characters bone would break in the same way it's broken on the other person and slowly, over the course of a few minutes, would heal due to an also present regenerative power. 

The healing regeneration, however, only works when he absorbs an injury from another party.

The pain would be severe, and similar to whatever the other person felt