Orc banner is a must, this deck is pathetic without it. With all the minions fierce and winning skirmishes, they get big quick. That is also part of the reason for
Siege Troop, big minion who can win a skirmish, hopefully with an overwhelm. It is 21 minions/36 cards, so the ratio is decent. I will definitely add a couple of agitators, and maybe some engineers.