I think most of us run Shalai, I do since its release at least. I almost never run Revoker, too vulnerable (this is just my feeling). I prefer Sanctum Prelate over Meddling Mage, higher impact and potential gamewinner in several matchups. I guess dropping Gaddock, or moving him to the board, can be considered if the decks he's needed for are not played much, but in general he is too good not to play, I think.