New feat (casters)

Implement Focus
Benefit: Choose a specific implement, such as an orb or a totem. You gain a +1 bonus to damage rolls with your chosen weapon group. At 11th level, this bonus increases to +2. At 21st level, it
increases to +3.
Special: You can take this feat more than once. Each time you select this feat, choose another implement.

Implement focus is implemented (haha) in order to balance out the disparity between [W] damage and spells. There are several ways for melee characters to improve on their base damage (focus, better weapons, not to mention that most weapons have other bonuses), while the casters only really have the feats that gives bonuses only to specific types of spells, but also require two specific stats at 13.

Implement focus is a untyped damage bonus on purpose. This means that casters can take both this and for example burning blizzard.

Aside from that, I am considering the Implement Proficiency above. But it needs more work.