Well, now I can't wait to see what kind of forms you plan on coming up with. (If I see a reference to Mara in the final form I'm gonna bust a gut.) Though, with the multiple forms, do you really need to shapeshift? xD
The reason I wanted to see a good limit on the powers was that your Sin's powers will get indefinitely stronger as long as they take effect, unless the Lust Empowerment doesn't work on effects induced by Cameron's other abilities or it has a cap on its power.