Talk:Ability/@comment-6831604-20130807121027/@comment-7733174-20130807124231

Yes. For ability level boosting, the only factors that are taken into account are the ability level and rarity of the card you are boosting, and the ability level and rarity of the feeder card(s). Shinji started a chart on the %.

http://marvel-war-of-heroes.wikia.com/wiki/User_blog:ShinjiTakeyama/Ability_Boost_Tracking

I tried making a google spreadsheet to fill in more info but it got very time consuming and I put that on the back burner for now.