Small issue with the proc macro on arc mages.

Some encounters in dungeons I need to move in a hurry, and all my dpsers, so when I hit alt + f to get them all to move and follow, the arc mages if 1 or all happen to be on a proc casting arcane missiles they do not move until they have finished the cast, so they either by then have died, or I noticed a little to late that one is out of range and didnt move with the crew and still died.

Whats the way around this ?