Just had a thought. .. a vague idea..
What if one warrior , sorcerer and rogue could couple their attack by handshake using a 5th button and release a special attack with immense power.

For eg: Warrior and sorcerer handshake: Warriors axe and sorcerer fireball combine to form a Fire axe throw... 3 times normal attack power is released.

Or a funnier one: Warrior throws sorcerer at enemy... ) ..WWE style ))

Pls give your ideas and thoughts about this. ..