You can do well with every class, just make a contract with the following:
1x Embezzle
1x Understanding
3x Gambling

gamble till u get "Trapezohedron" accessory, get every useful hability for your class and get another Trapezohedron to absorb "Eternal Dark" into your character and absorb the legendary skills that you want on accessories too, afterwards its just accumulating "Power" or "MaxHP" if you got the main attribute stats by MaxHP, hardest part of this is not dying from "Spirit Body", but after you absorbed "Eternal Dark" everything will be easy.

Not so hardcore rpg if you do this, basically cheating without cheats.