Charms needs rework

Charms with no dammaging skill gets bonus to dmg…rly??
There are some support skills with no dmg effect like smoke screen (DH) and many other. We have 5 spaces on full charm and 5 skills available. But since you cant have same skill twice on one charm, there is lost 1 spot for every support skill.

And when I tryed to upgrade my charm skill with higher number (I had 2% from basic craft) of same skill I couldn use it. So I lost 1 full extracted charm. And only way to get higher numbers for skill is create new charm or destroy the skill spot first.