As in most games its very easy to edit Valis and Skillpoints.
Without going into the details here is a rough walkthrough.
Open cheat engine.
Put in your value in 4 Bytes First Scan
buy something
Put in your new value Next Scan
You get 2 Adresses, change value to whatever you want and now you got more.
Added a savefiles for you lazy people

it is saved on page 10/10
Shiori79 - NEW GAME - Belle Valis/Skillpoints edit
after the first quest when fighting the first 3 goblins.
Shiori78 - Chapter 2 Belle - Saved including Ais edit.
Shiori77 - Chapter 2 Ais - Saved including Skills to Ais edit.
Extract the file into
C:\Users\%username%\AppData\LocalLow\MAGES_ Inc\IS IT WRONG TO TRY TO PICK UP GIRLS IN A DUNGEON INFINITE CONTE