AP Up

AP Up is a effect in Xenoblade Chronicles and Future Connected. It raises the amount of gained when enemies are killed.

Overview
Aside from being unlucky with advanced arts manual drops, AP is pretty much the limiting factor on how much arts can be upgraded. As a result, the only strategy for AP Up gems is to put them on characters that have arts the player wants to further level up. Unfortunately, they are even rarer than EXP Up gems.