well, I think that HA (in my gaming experience) are only overpowered against celtic type factions (meaning factions whose soldiers have little armor) if you try with an army of HA to pit against an army of a civilized faction with higly armored troops, you'll find that they are less than effective. Now, I think armored HA should be limited as those guys are Catraphacts no matter how you put it. It should vary from faction to faction for instance Parthia should be able to field more HA than AS for instance...
Just my 2cts...
Oh and im'plement that rule where HA after depleting arrows are forced to charge so they don't go and run around tiring the enemy.
Cheers...
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