Tactics for the Swamp (Fortress).

...there were 2 more questions about heroes... maybe someone will answer. About Tazi and Crag Hag, etc.

Tazi or Crag – there isn't much difference, but attack is better for fast monsters, and defense is better for slow ones. Logistics is useful everywhere, but especially on large maps. In general, it's better to level up the hero who arrives earlier.