Board Thread:Wikia Discussion/@comment-27279544-20170528163214/@comment-26154973-20170617235038

They follow 1%/10%/12% (SLv1/10/15), 3%/12%/14.5%, 6%/15%/18% and 9%/18%/23% for small, medium, big (this event weapons) and massive (xeno weapons), respectively, on its multiplier (1 + skills * ranko aura + ...). Normal weapon attack skills are on normal multiplier (1 + skills * primal aura + baha + character aura + character buff), they are the same for small, medium and big, but there is also II (7%/16%/20%) and III (8%/17%/22%, so it's different from xeno weapons). Magna weapon attack skills are on magna multiplier (1 + skills * magna aura) and follow either medium or big (also the same).