I know there is 12 more cards than a minimum deck size, but trust me, you'll have a lot oft cards in your hand and your battle will end with win in about 3-4 turns. I tested it vs orcs and chaos and it's superb! I won 9 of 10 with orcs (rush deck) and 7 of 10 with chaos (plague bombs, bloodletter and other damaging units cards). If you want you can remove some cards by 1 like (Master Rune of Valaya, Demoliton!, Twin-tailed Comet, even 1 or 2 Contested Village). You can add 2 Voice of Command or Grudge Thrower or other Dwarf card with loyalty (maybe even a banner with Imperial and Dwarf loyalty symbol). I didn't tested it vs Dark Elves, cuz neither me and my friend doesnt have some good decks for them.

How to use it? It's simple. Doubling with the Guard + some Legend with 5 loyalty symbol or Cathedral of Sigmar (or whatever you want with 5 loyalty symbol) draw 5 cards, put quest, draw card, put unit into the quest, put some support cards of imperial (you can even add Church of Sigmar, instead of other support cards) and draw another card put other unit into the battlefield (my best draw was 2 Warpstone Excavation 3 Peasant Militia, 1 Imperial Drummer, 1 Sons of Coin - and that all in one turn!) . If you will be attacked you will in 75% have Master Rune of Valaya or Chain Lightning (that second can be even combined with Twin-Tailed Comet) and you'll be safe, but dont forget to save 2 resources!

If you have any suggestion please write a comment.