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Well, if there are a lot of cyclops, I acted like this.
After the wait, Heroic Assault, + with speed boost from the skirmishers +2, a lot of luck - well, it depends on various factors. And this is Blood Rage, when your army is hit, it gives +1 to the turn.
They rush forward, deal damage, then on the next turn, you can add reinforcements of level 3 to slightly compensate for the losses. And only then, a retaliatory strike with a fist.
In my battle with Ishtavan, I had about: 158 cyclops, 267 skirmishers, and 647 goblins. Well, and other troops - but I only used these troops to defeat the dragon. (under Heroic Assault and luck - they dealt 72,000 HP in one go (the dragon had a total of 185,000)
By the way, orcish mages are also quite interesting - their idols are a cool thing - you can increase the defense of your troops or strike with chain lightning. (depending on the path).