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[Round 0: Erephir drinks an ACC potion before the battle and takes "New Life" in hand.
Tirza also drinks a potion for accuracy.
Naria, while invisible, attacks target 3 (it would be better to use a musket, perhaps, if she uses cover at the same time to reduce Ivor's chance of hitting her; that would be excellent).
Round 1: Erephir runs to capture the lower-left building with the musketeer.
Mahus runs to capture the upper-left building with the musketeer.
If, according to the game mechanics, area-of-effect spells can be reflected with a shield, protecting allies in the process, Valerius applies a fire shield to Tirza. Otherwise, he casts a fear spell on Christian and Co.
I will tell you what Naria and the one following her should do when I know if our assassin is still alive.]