Average Dwarf

Hello, comrades! I'm facing a problem – I can't defeat that darn gnome on the "Former Friends" map. The game conditions are: we don't attack each other, and the final battle takes place in the 3rd month. Our levels are around 17. The opponent develops his army as shown in the attachment. The main problem is with the Trolls. When they approach with the "Battle Fury" rune (attacks without retaliation on everyone around), they significantly reduce my army. The Dragons are annoying because of their damage reflection (I gathered a large number of cavalry units for the human faction, and they were wiped out like matches). And all these troops are also incredibly resilient and get resurrected.
Once, I couldn't do anything at all because the Harpooners and Berserkers constantly stunned my troops (there's some kind of rune there), and I was defeated by the Sylvan faction.
By that time, he usually has good artillery and high defense. What do you advise?