For some reason, the arcane mage rotation is not using arcane missiles at all. I tried checking the code to see what conditions we needed for it to show that I should cast it, and as I suspected it was a clear cast prock, but I'm not sure if it is bugged, but I just wanted to bring it up. Turning off AOE seems to fix the issue, but I am not sure what is causing it.

The arcane missiles have an active_targets < 3 check on them, if you were testing it on dummies it likely picked up a cluster of them which meant arcane missiles only showed with AoE off.
Arcane missiles seem to show fine (and dummy testing is farily wonky on Arcane due to the amount of variables it uses)