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Yeah, you'll get 100500 shots from the archers, you'll have fun. Thanks to the preparation, you can dominate in all stages of the game.
What archers? Archers will be taken down in the early game by the same mages, elves...
What other build? The "Triple Ballista" perk is available to many. Demons simply prioritize Attack and Magic stats, which are exactly what the ballista's damage depends on. Teleport and speed spells are also available to everyone.
But does everyone have quick portal opening?
No one plays on large maps in Multiplayer. Necromancers only lose in long games, and even then, if they don't have extra towns.
What are you talking about? Don't the people you know play? In fact, most people play on large maps for a grand endgame, to fully upgrade and utilize all possibilities... This is where the balance ends, and mages dominate.
It's not worth it. You don't necessarily need to go for the Castle of Heroes - Enchanted Arrow + Rain + Ballista is much more effective and faster. And I don't even mention the Archers.
That's also an option, I don't argue.
It's good at the beginning, but then it's useless. Invisibility is easily detected after a couple of turns. Of course, it's easy against the AI.
The tricksters annoy them... Although this tactic is often banned in many places...
Miniatures are great, of course, but only for long games and well-developed heroes. Mages dominate thanks to their vast knowledge and magic. Units are weak, Rakshasas die in one shot... Golems and Gremlins can survive for a while if the former heal the latter.
With miniatures, even the Academy units start to dominate, Rakshasas don't die as quickly anymore, and if you add +13 to the Gremlins' health... +30 initiative...