I also think such a list, especially with the goal of preparing for a tournament, should not be named and look for the "Top 10 Cards", but the "Top 10 important Cards" that list the cards that, given the right setup, can be the dominating card and the ones that are important in most setups. Without order but top-down from the list on the blog
Courtyard: BM-Courtyard is almost as fast as BM-Envoy, go for it.
Pawn: can give crucial +buys without disturbing the deck
Masquerade: no comment necessary I think.
Steward: is a really fast trasher, I think it's more reasonable to get a "Chapel-like" deck with it than with Masq. But Masq. has other advantages of course.
Swindler: nc
Bridge: nc
Conspirator: nc
Mining Village: nc
Duke: WW is the Duke-expert here, I don't really know how likely a Dukestrat will be reasonable on Intrigue. And I don't know the modus of the tournament, but in 3/4player even on non-optimal boards going for dukes might be possible as you prisoner-dilemma your opponents into who's stopping you. So maybe no-one does. On the other hand, they only need 6/4 provinces each to run the pile out. But at least on the list to be considered I think.
Minion: nc
Saboteur: just kidding
Torturer: nc
Harem: for big-moneyesque strategies.
Ok, that were 12. However...