I've modded my game to give KH two units of uber-Spartans at the beginning of the campaign - they have double gold experience, and gold shield and sword upgrades.
However, I've also made Spartan hoplites completely non-recruitable, so once the two units of uber-Spartans are destroyed in battle, that's it - the Spartans are history.
For me, this represents as accurately as possible the historical decline of Sparta as a major force in Greece.
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