You have yet to prove using multiple cards with various amounts will result in a likely chance of significant loss:
It won't.
I stand by my system completely. Getting ripped off with my system is as likely as your waitress refusing to give you change out of a $50 bill.
Son, there is no system. There is only a very vague idea. I appreciate the fact that you are thinking and coming up with ideas, but I don't appreciate pompous bullshitting. If you ever actually start developing a system around the ideas you outlined, you might notice that the devil is in the details. More likely, you won't even notice, but you will continue working immersed in arrogance.