Would you like to see elephants with a bombard cannon on their back? Unit has the same stats of hp and armour as the elephant archer, but has 12 range and the damage of a bombard cannon.
Basically the unit is a high hp bombard cannon unit. That can be healed by monks since it’s a cavalry unit.
They could be an untrainable unit, that can only be trained in scenarios, to stop guys whining over how overpowered they are. You need to add a trigger to allow training of Bombard Elephant. Or spawn them with create unit in order to have them in game.