Talk:Janus/@comment-24.117.131.170-20130413050600/@comment-7011711-20130417151457

amount of AP doesn't affect how well you do in the current event. Low AP cost means your attack points are used up less, allowing you to do more attacks. 15 AP cost gives you the best deck to attack a 0 DEF person as this gives you the maximum BP gain (no penalties for low AP) and lets you attack many times, leading to higher BP gains per AP used. This means that you will get a higher daily battle ranking without having to use much potions or anything. If AP isn't a limiting factor for you (i.e. you're rich and have tons of power pots) and you can attack however many times you wanted with whichever AP cost you desire, then you don't really need to consider ATK/AP cost efficiency at all.