... I think it is best for him to be part of a LL pack.
Because MK is a very unique character, who is based on Monkey Magic (aka Wukong) from Journey from the west.
Before he started the journey, Wukong was the ruler of his own clan. Not only he had demon/monster bloodbrothers, WK also fought the celestial court.
MK is best to have his unique faction and mechanism, something like Yin and Yang: MK can choose to be order or destruction; with order he can recruit low to mid tier units from Cathay; with destruction, he is able to get some demon/monster units.
To compensate for having no high tier units, MK is kinda overpowered as in the novel, because he is both expert at martial arts and magic. If defeated MK only has one turn before he returns; even when he is captured, the knife ear batman can only keep him for one turn because Wukong.
One more thing, although MK is able to recruit bad guys, he can't be swayed into Chaos as he is too independent.
Return to monke ...