What would you suggest?

It's simply impossible to counter Gnomes. Against Chaos, they use the Elemental Resistance rune on two creatures, giving them 50% fire immunity. Against Darkness, they use the Exorcism rune and a Guardian Mage. With the latter, Gnomes can even steal from Vampires. So, how do you kill them? With Phoenixes or Elementals? With their defense, it's impossible.

Let's ban the Resurrection rune and the Guardian Mage. Or increase their cost. I don't know if it's possible to adjust the rune application mechanic so that a unit applying a rune pushes the hero back 0.1 on the scale. Then the opponent will have a chance to try to counter the Gnome with magic.