I am just throwing this out there to see what opinions might be.
How does this sound for a rule when playing the Alexander expansion as Macedon.
The Macedonian player may only purchase one Alexander unit.
Regardless of how many are playing in the multi-player game.
In other words if there is an 8 player game, 4 Macedonians and 4 Persians for example only one of the Macedonians players may purchase the Alexander unit. The onus would be on the Macedonian team to decide if they purchased it and by whom.
Also if, Alexander suffers death during the game the Macedonians lose regardless of the battle’s outcome.
I feel that rules are totally justified because of Alexander’s historical significance.