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Yes, they are unpleasant to fight against when they are neutral. You can't control them, they are difficult to defeat in melee combat, in short, they are a pain. But it also doesn't work out to use them effectively yourself. What's the point of leveling up a really strong Solmyr (well, you wouldn't level up Alchemists for a Tower), if the enemy hero-warrior with Archangels simply goes first and takes the first turn?