easy peasy. get taunt, 2x skill and max hp for knight. for priest, 1 level of revive, max heal, AOE heal and 2X skill. ranger max first attack skill, get 2X. mage, max fireball, get 2X. king, max the starting attack skill and get 2X. the rest is up to you. I gave king movement upgrade and dodge so he can participate in battle more with the other guys. 2X skill doubles damage and healing. 2X skill for everyone = win button!
no but seriously, needs a speed up button so when you're just uselessly bouncing up in the air because you have no momentum you can end the turn faster