1st like your new Avatar Milla
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Now I didn't know where to put this, but I was doing some mental exercises when I come up with a sort of scary thought. We all know treants (or however they are spelled) are scary creatures, do to their defense boost. Well imagine the following scenario...and shiver.
1st (I don't know if there is one but) you take a hero who gives bonuses to Treants. Then you take the following skills. Defense and the good associated perks(probably MR), Light Master of blessing (and associated perks), Summon (and associated perks), Avenger (doesn't really matter but you pretty much have it so there it is), luck (and associated perks), whatever else suits your fancy.
Now you save all your treants out of combat for as long as possible, and get your hero to a decent level. Meanwhile the treants are building in a town (they make excellent town defenders). Now once you have a sizeable ammount you get your hero to take them, two stacks of Master Hunters. 2 stacks of Elder Druids, and the upgraded unicorns to attack any enemy outside of a castle..at all. So you cast either mass haste or AA on the Treants. If you attack it would be haste, if not AA. Once you have them pounding on the enemy throw AA on as well. Your enemy will pretty much be focusing on them, as they do a lot of damage and also they have a ton of hps. With your abilities, once they are in the midst of the enemies you decide to attack or defend (attack if they are ignoring your treants, defend if not) even without their 60% defense boost they have your 30% do to defense. And if you keep your silver unicorns with them, almost total MR. Which means they are nasty, really nasty. There is problems with this and it is not perfect, but scary.