Magistar
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There's an Orc with a super ability that grants +500 to blood, as well as the "Memory of Our Blood" skill, which grants 50-100 blood. There's also a pile of skulls that grants +60 blood. In addition to all of this, there's a Mastery Amulet and the "Wrath of Fire" skill, which increases blood gain and consumption by 50%. As a result, at the beginning of the battle, units will have a minimum of 750+90+75=915, and a maximum of 750+90+150=990 blood. Considering that 750 blood is required for level 3, they already start at level 3. I wonder, is this even counterable?
As far as I know, the "Memory of Our Blood" skill doesn't grant a bonus to the super ability. I'm also not entirely sure about the bonus from the castle, but even so, it's quite possible to reach level 3 at the start, but considering the not-so-great starting perks for the super ability, there are builds that are even stronger for Orcs, considering the better skills available for leveling up.