And if I were getting basically free troops (Son of Niefel winter wolves, Ermor undead masses, Mictlan slaves, "random event" militia) I might stick them way upfront to soak up the early missiles, spells, and lance attacks.
"Ave Caesar! Morituri te salutant!", shout those stuck in front.
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Are we insane yet? Are we insane yet? Aiiieeeeee...