[Tyhm]

Better idea:
Rodeo skill. Requires an equipped rope weapon.
Like oratory/leadership, controls certain monsters - but in such a way that the player rides the monster. With nested ganis it'd be trivial to make it...a newbie rodeo'er could ride a bunny. A middling rodeo'er could lasso a Smoky, Dievil or Heavil, and use its attack while riding it - see also Golden Axe Warriors, if you remember that game. An expert could ride even a T-Rex. All attacks directed at the player attack their mount until it is dead.