Art was good and game had a solid idea to grow on.
I would definitely make more slots to fill in the scale and make enemies also use it. Some skills even needing exact balances. Like you have to have 3 moon ,2 sun in your turn to unleash a powerful attack.
Some random events changing it. Dying enemies also change it. In short I would make it more strategic because in the current play mostly I was using 1 guy to charge stuff for the other and that was it.
Ending was unexpected and funny. I hope pally is not serious :)