Tactics for the Swamp (Fortress).

In offline tournaments, I had to use First Aid. It's good on maps where you start with some level 7 creature and can break through a lot with a tent. In online play, I used it deliberately only once, in a mage tournament - I started as Gem with the idea of building a strong army. By the way, 2 unicorns with a tent were good at breaking through ranged units. Regarding the choice between Crag Hack vs. Tazar, you need to look primarily at the skill build, whoever has a better skill tree should be prioritized. And it also depends on the random artifacts; if you get a lot of luck artifacts, then Tazar is more interesting, and if there are a lot of stompers, then you can also go with Crag and a ballista. Or you can just stick with Gurny :)