@Zeeeend
from what I can tell, the 1/2 active mod rounds up, so you actually get the maximum bonus of +5 at level 9 (9/2 = 4.5, rounds up to 5 ap). Also, since it is a party skill, it only counts the highest level instance of the skill in your party, so having multiple people with the active skill is a waste
 "Elona Shooter"){kind=icon}
 "Discorderania"){kind=icon}