Starting a 10-box team. How to level?

[Hiddenbrom]

If tag on mobs share within a party:

Play from main character.
1 mousebutton / key = toons in group 1 assists and attack.
2 mousebutton / key = toons in group 2 assists and attack.

Finish quest on group 2 first, then on group 1 (your main character very last, so you can track "shining objects" / quest requirements).

Rinse and repeat.

Does anyone know how to set this up? 2 different keys to decide wich group is gonna attack.