What about increase the bonus damage to 65 or 75 % (or even make it 50, 60 and 70% per age) and include the monks and the siege in it (siege could be cap to 25%)
This bonus is the only eco-military bonus that the Sicilians have besides the farm bonus and is more like an anti-bonus for the enemy counter units
This way you have to make less military units but the proper ones to go agro
And they really need a water bonus IMO