Recently In game I was in a party that decided it was going to do battle regiment mode. I had never used it before being new to the game. I attempted to use the hotkey Shift+1 and it did not work at first on the selected mob. Afterwards it would work at random sometimes lighting up on a different enemy. Knowing it wasn't my machine keyboard or connection I experimented a little and found that the way I locked onto the enemy determined If I could use Shift+1,2,3 ex or G to enable regiments. Double clicking the cursor to lock on and then using attack abilities didn't work. I had to target and then attack out of range before the buttons functioned properly. Occasionally after using a regiment in combat it would stop function as well seemingly random. I looked up plenty of guides about Battle regiment and none had anything close to this. Don't know if anyone else is having the same issues as I am, sorry If there is already a post!