[Rytek]

Usually the large army stacks the computer puts together are horrible morale due to all the starvation. This is doubly so with the Spiders of Machaka because they are large and eat more supplies. Try using large groups of mages casting Panic to force a retreat. Try to do it in an area where you can cut off its retreat paths and the large armies start to disapear.

Pd is usefull against the AI. Start recruiting indep commanders everywhere. Merge them with your armies and have small blocks of 5-10 shield infantry guarding them while your commanders use HoldX5 or you can give them bows and have them fire closest. Have 3 or 4 of these blocks spread across your front. Behind your front should be your archers. The horse archers are probably not the most efficient vs the AI. Better to make the cheapest archers to have more of them. The AI will never target them as long as something is closer.

Spiders actually have a hard time killing because of their low damage and big size. Crushers (construction) and Wood Golems make good blockers and will pile up spiders around them.