Your starting weight was 153. Your goal is 120. And you want to achieve it on a 10 day fast????
I think thats very unrealistic.
I think the Master-Cleanse will jump start you, and you can probably hope to lose 10-15 lbs on a 10 day fast. But you'll have to be very careful about how you eat when you come off the fast to keep that weight off, let alone lose another 20 lbs.