Additional effects for Combat tree skills is a mod that adds various bonuses to different tree skills. This mod has included various combat tree skills such as:

Muscle Memory which adds all attack action damage plus 1% max health lifesteal.

Strength Training which adds all attack action chance of Stunning.

Presice and Crushing Blows which add strong attacks benefit half value effects and fast attacks benefit half value effects.

Sunder Armor benefits all attack action.

Deadly Precision wherein each Adrenaline Point adds 1/2% chance of instant skill an enemy with more damage without cooldown for instant kill immune enemies.

And so much more.