opinion poll: what's the most useful cheat? the one you get after finishing a route? mostly for replay value.
Max fame + max money and you never need to do anything again lol. Max VA skills is pointless if you have max fame because with max fame you don't need to take any auditions, you will automatically win the Seiyuu Award. So basically with max fame you can completely skip auditions and use your time to interact with your guy.