User blog comment:ClariS/Unofficial PBE Patch Notes (148)/@comment-82.240.214.188-20120918185342/@comment-213.114.249.127-20120920080928

^ We are talking about AD carries here, not about ap carries. AP is useless on AD carry varus, as AD carry varus wont buy any ap.

Buffing varus AP ratio is NOT a buff when he is played as AD carry.