Vadimh
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While the Human is casting support spells to block melee units, the Dwarf will have time to buff himself with runes and simply kill the Human. Vampirism can be countered by removing the effect, and the Dwarf is likely to have that ability. Trolls don't have a high initiative, and by the time their first turn comes around, angels, unicorns, and griffins will have already moved. If, by the time the Trolls' first turn arrives, the entire army is lined up and taking damage from ranged attacks, that's a problem for the Human, not an imbalance caused by the rune.