I'd agree that they are good at healing. I'd say that is defensive identity. Ignoring the protection/heal issue, healing is solo.
How can we make heals an identity for Jedi or make being defensive an identity?
Maybe tweaking underpowered Jedi to have bonuses on turns after heals?
Example: Mace expose has additional 20% to proc if healed by an ability before turn? That would give him synergy with healers.
Ahsoka's unique buff could also reset when healed by an ability (excludes gear leech). Or, maybe if fully buffed and full of life, Ahoska then has chance to case critical avoidance on another Jedi if present. Similar to chief Nebits protection concept
Jedi knight gaurdian assists when another Jedi heals. Think of this like AA's leader except it only procs for her and only on heals.