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KITOBOI, do you and your friend play on equal footing, or is he stronger? Because if he's much stronger, you won't be able to beat him with any faction! You need to feel your opponent, anticipate each move, and so on.
Added after 16 minutes
Here's another very reliable and awesome tactic! If you get the "Wrath of the Horde" skill, level up the skills, collect Lionheart and Weapon of Power on any map – there are tons of artifacts, even duplicates, level up Empathy, and only cast spells with the Horde. The hero practically moves through the units on the scale! And you get a very powerful Arcomage! And there's no anti-magic against Wrath of the Horde, and runes don't work! But it's not that interesting for an Orc! He wants to crush with brute force, and it's up to you to decide!
Added after 16 minutes
Here's another very reliable and awesome tactic! If you get the "Wrath of the Horde" skill, level up the skills, collect Lionheart and Weapon of Power on any map – there are tons of artifacts, even duplicates, level up Empathy, and only cast spells with the Horde. The hero practically moves through the units on the scale! And you get a very powerful Arcomage! And there's no anti-magic against Wrath of the Horde, and runes don't work! But it's not that interesting for an Orc! He wants to crush with brute force, and it's up to you to decide!