The way i did this was with the apprentice. I'm really bad at this game but still found it pretty easy. What i did was going as normal through the first 4 stages of the story, they're really not that hard. Just do a lot of throws and block a lot and you should be able to go through those stages pretty easy.
When you face Algol as the last boss he's a little trickier. Hold block all the time and do throws when he's standing next to you. He counters a lot and can easilly drain half your life if you're not paying attention. Once he's down to half of the green you can take more chances to end it faster as time may be running out.
Once he's dead the achievement will pop after the screen that shows how much money you earned.