Capturing the Medusa Lair with a Graveyard Stack. (Medusas in stacks of 8, on the Swamp)
Hero-Westan, level 5, expert in Armor, expert in Ranged Attack.
Army and formation: 2 Sylphs, 2 Flies, 25 Goblins, 4 Flies, 4 Basilisks, 40 Gnolls, 3 Flies....
Round 1 Flies 2 and 4 carefully move to the positions marked with crosses, without touching the Medusas. Flies 3 attack the Goblin stack; the Medusas retaliate, killing 1-2 Flies, possibly petrifying them (it doesn't matter). Sylphs attack the Goblin stack, leaving a gap for the Gnolls; they kill one. Lizards shoot at the Goblin stack, killing 3-4 Medusas. The Goblin Medusas attack a Fly, but even they can't kill it. Gnolls finish off the Goblin Medusas through the gap between the Sylphs and the Fly. Still Round 1 Gnolls finish off the Goblin Medusas through the gap between the Sylphs and the Fly. The right Medusa stacks attack the Basilisks, killing two. The upper left Medusa stack attacks 2 Flies (always! and this is very important; if they attacked 4 Flies and petrification occurred, it would greatly hinder creating a space for the Lizards). In the example, 2 Flies are killed immediately :( Round 2 4 Flies take the place of the deceased. Sylphs attack the upper left stack (not fearing petrification). Lizards shoot at the right middle stack, killing half. Gnolls move upwards. The right Medusa stacks finish off the Basilisks; they may also shoot at the Gnolls.
If in round 1, the Goblin stack petrifies the Flies retaliating, then it will attack the Sylphs, and if it petrifies them, the Sylphs will not be able to attack/block the upper left stack in the second round, which could cause problems.
I did it a little differently. The upper left stack attacked with a single Fly, Lizards, and Gnolls. One Medusa survived for Tazik, but it was no longer dangerous. Westan will kill this stack immediately, and you don't need to waste a Fly on retaliating.
The Graveyard stack attacked with a single Fly, then a large stack of Flies, then Sylphs. In this way, the Sylphs will not be attacked in the first round under any circumstances. I moved the Lizards to the upper left corner in the second round to keep them out of the direct fire of the right flank; they then attack the Goblins first, then the Gnolls. In the second round, Flies again retaliate against the Goblin stack, if they haven't been petrified, and then the Sylphs attack. If the Flies have been petrified, the Sylphs defend, and then proceed according to the situation.