An approximate game scheme for the Swamp at 160% random.
Start with Tazar. (see templates for smka and 8mm6) - there is an opinion that he is the best hero for randoms in the entire game. There have been few cases of his defeat in melee. He can only be taken down by magic. But it can either be blocked by resistance or be present on Tazar himself :) Or simply a cloak or sphere; then it's very problematic to win against him.
On the 1st, we place hydras. (it has never happened that they didn't appear :) in the fort or if lucky, in the castle.
On the second, these hydras (2-3) together with Tazar take any wyvern tree. (finding it is the main task), but on these templates, it is solvable. Then, with a super cool stack of upgraded wyverns (there were games with 50+ in the second week, + angels from conservatories), the Dragon Utopia is taken either at the end of the second or beginning of the 3rd. And then a rush to the opponent.

Regarding units
gnolls - decent
Lizards are super units (damage 2-5, good health, marksmen can't compare!)
basilisks - respectable + ability
flies - super units (removal of weakness and speed)
cows - I think no comment
wyverns - weak, but fast and there are many of them!
hydras - super. multi-headedness solves multi-target tasks.