FIRST........ make sure both of your accounts key bindings are the same.

THEN.........when you cast one thing....the other toon responds at the same time with another cast from the same keybinding.

TRIAL FRIGGIN ERROR.....lol which is why you create them at the very beginning and learn as you go with your setup. Only you can decide how you want to spend your time in casting or healing or sheeping...etc etc etc.

There are plenty of suggestions on how to SHEEP in this forum. Your strongest casts most likely be the ones you can easily get to with a touch of the button. Many of us MBers dont CLICK the screen as some do who solo play. Get used to doing everything with the push of a key.

GOOD LUCK.