So far assassins have only taken a single victory in my cube and that wasn't the correct way to play that particular game
You pay all costs and follow all timing rules for cards played with the permission granted by Banon's first ability
Primal Prayers is one of them
The Queen, Commanding Presence Though there is only one copy of The Queen, Commanding Presence in this deck, her ability is powerful enough to be worth prioritizing, especially if you can shift her onto The Queen, Regal Monarch as early as turn two
Zedruu requires a little bit of political acumen if you plan to build it this way, but its not at all difficult to determine which effects youll keep for yourself (the Propagandas, etc.) and which youll pass around the table (your Fervor once Zedruus made use of it already, your Akroan Horse to benefit the other two opponents, etc.)