I did try a deck like this for a while at various sizes.  56, 63, 70, and 100 (to have doubles of key cards).  It was a fun idea, and I was able to pull it off as planned a few times.  However, it was consistently unable to beat top decks and players.  I'd be glad to share what I have, but I admit that in the end I decided that there just wasn't enough to make the strategy work yet.