Aggro Down

Aggro Down is a gem effect in Xenoblade Chronicles. It lowers the aggro generated by the user's damage and healing.

Overview
Naturally, any non-tank will appreciate a cut to their aggro generation, whereas those who do want the aggro will never want to use such a gem. However, note that the gem does not affect aggro generated by non-damage/healing sources, such as the temporary aggro that art usage creates.