I beat the game cheatless earlier this year with this strategy.
First of all, to start out all resources go to Amy. Her and her belly deserve to have possible resource expended on them. Until she’s maxed out, no one else gets anything. Having one level 10 character when going through the game was easier than trying to keep everyone even.
But like mentioned above first thing i did was get Amy the bonus experience skill. Then the hunger increase skill.
Besides my loving the belly, she has a ton of defense, and isn’t limited in when she can attack due to her passive. Just top her off and smash.
The Amy first strategy worked for me because it allowed me to breeze through battles early on, paving the way to make it quicker to bring the other up to speed.
The rest of the game is easier at that point.