They look really good! I hope that the Oathstone's runes light up in the attack sprite
Just a couple things:
-the troll slayer's left axe perfectly covers his left arm+shoulder, it actually took a while to understand he was dual-wielding, at the start I thought that he had a metal shoulderpad or something like that.
-the deer antlers on the ranger champion look a bit unappropriate, especially if you're trying to go for the Warhammer Dwarves and not the "grumpy comical" ones.But that's subjective
I was also about to suggest an "Howl" style national spell to call miners from the edges of the battlefield(mimicking their WHFB counterparts), but I see that the Miner's commander already does that as #onebattlespell.