If you're going to really follow through with this deck, and it is good enough to make me think it could play against oracle, there is absolutely no reason to really have any sort of coin in your deck. You'd want to be able to get money from the secret chamber and not the treasures. Think treasures in an minion deck, it isn't nearly as productive as it normally would be.
Thus, upgrades should be of most importance to eliminate coppers and eventually silvers -> WV. Golds aren't important whatsoever to this deck. That's the biggest improvement. So T6 should have been an upgrade as well.
