[Poruku]

keep it like it is. cap the level at 100 still, But:
Per Hit- Heals 25 HP (or level if its lower)
Per Crit- Heals 50 HP (or level if its lower)

This sounds pretty good to me. Meaning builds that use it to consistently attack and crit will still get similar results, while tanks that use it to simply heal constantly will find it less useful