First off let me thank everyone for your opinion, I agree that arm of the destroyer would be useful against 5,6 or even 20 mobs for damage but I got 2 complaints, is 50 potency worth 130 tp when u have elixir field, Rockbreaker, and howling fist that all damage groups of enemies for more potency and less tp? 2 you would have to spam Arm of the destroyer 3 or 4 times to even have any hope of doing any real aoe damage at all so u just wasted 390tp or 520tp in literally 3 or 4 seconds and u wasted precious time on your greased lightning stacks. And what I hope is that some moves in the Monks toolkit get worked on in a patch (im looking at fist of wind and arm of the destroyer).