I would do something a little more similar to the reccomended rising layout, move the pin and cg up say an 1 or so maybe over a bit, try and get it in a decent location to the persons pap and not too low in the grip. I'd take the mass bias and go with a 45-55 degree angle in relation to the pin so its not overly close to the PAP and not way to far.
That is just how I would approach but elements of the bowler I was mapping out the ball for would be taken into consideration.
And on your Idea, I really don't like the idea of the mb close to the pap and on/past the val, and with a low pin it would probably just roll really early have not save any energy. That is just my opinion though.
--------------------
http://www.absolutebowling.com