Your defensive options are rather sparse. You basically have 2 Brace Yourself and guards. I would run at least one Harshforge Plate, and seriously consider what other defensive measures should be in the book.
Meditation Amulet seems a bit out of place. You could play it after the Barracks to increase your mana output, but it's not very action efficient without a Battle Forge to cast it, and you definitely don't want to use it if you're manually casting creatures every round. Opening
Turn 1 (19): Barracks -> Garrison Post (3)
Turn 2 (12) [2]: Deploy Goblin Grunt -> General's Signet Ring -> Garrison Post (3)
Turn 3 (12) [3]:
Leaves you one mana short of being able to cast Meditation Amulet and deploy a 13 mana creature round 3, which is really when you would want to fit it in. If you gave up on deploying the Goblin Grunt you could fit it in.
With all of your low armor creatures, Standard Bearer might work well.
I wouldn't run Group Heal if you want to run Skeletal Knights.