hello. Maybe its already said but i think would be ggod to have buff icon for passive skills like residual energy. And the description of the skill is a little confusing, like how is writed seems that adds 30% of the spell damage to the attacks and not like it does a buff of 30% to attacks. you could write something like "When you cast a spell you have 30% more damage in attacks with the element of the spell for x seconds".
thanks