Tactics for the Swamp (Fortress).

The Swamp is far from a weak castle, I THINK SO...

While conducting your in-depth analysis, you forget about things like unit skills and abilities. The Swamp faction has very high defense, and with proper use, this gives them huge advantages over the opponent (player or computer). Tazar + Wyvern + Tent will defeat quite serious groups of neutral creatures without losses. Basilisks, in addition to having a good amount of health, speed, and armor, also periodically petrify the enemy, taking them out of the battle for three turns. Hydras, with haste, immediately reach the opposite end of the field. No one argues about the usefulness of Gorgons. You say they are easy to eliminate. Is your opponent usually so weak that they allow you to do this? It's a good castle, no doubt. It just lacks easily achievable bonuses like resurrection, which the Archons have.