Demon invasion.

Here, to fight effectively, it’s essential to fight to the very end. Berserker is good, but you need to build it up, and resources are scarce. So, you can generally skip the Necromancer faction at the beginning and focus on building a 3rd-level Ballista, Fire Arrows, and a Tent, then burn everything with Hellfire and Chain Lightning, and then quickly move on. The problem is that moving on is expensive; you need to build the Capitol as quickly as possible, and fight with your hero against Imps, buying only a War Machine and a Tent, or just a War Machine. The Necromancer faction will only be a burden at the beginning; luck will be more useful. As for me, I haven’t encountered the Barbarian faction; I’ve only encountered Mages and Necromancers. And as far as I understand, if you eliminate a Mage hero, it’s permanent. And artifacts mainly drop from these Mages. Considering that there is no sawmill on the Necromancer island, the Necromancers will also run out, as in my case