Mate I would suggest you go seriously defensive big if you want to topple Untouchables, get a guy with Wonderous or better ID and similar RB, forget about the IS as it will cost you too much and you have your fire power with your smalls!! Also make sure his game shape is min respectable as he hasn't played too many minutes in the week you go for him, experience helps too!
Like this guy;
http://www.buzzerbeater.com/player/5193571/overview.aspx