for Imperial Purists 3:
(Ideal)
Deacon
Lance Rider
2x Mortar Bunker
Warehouse
you can swap out deacon with some other siege/heal commander, and you can use 2 warehouses and 1 mortar bunker instead. Just make sure you have enough siege, or else it won't work. Drop Lance Rider first.
The deck I used:
Korval (or whatever that new siege 2 commander is called)
lance rider
mortar bunker
2x warehouse
got it first try