Mulligans
General Mulligans
Against Mages, keep the Crossroads Watch Post. Prize Vendor is good to keep if you also got Far Watch Post.
If you are sick of Secret/Libram Paladin, like I am, this deck also works fairly well. The Crossroads Watch Post is better than people think, especially against Mages. Spell Mage is like the only deck Mage players are playing right now and once they see the Crossroads hit the board, they often just concede.