Kallikrates
Prince
Slavery is already vastly overpowered now, so I would disagree with making it even more powerful for aggressive leader.
One simple minor improvement would be to give ALL Agg units one free promo (i.e. a certain number of XP) from the start, instead of only combat I to melee/gunpowder. This would remove the frustration when playing an Agg leader with a horse UU or generally when having to rely on horses or siege and not profiting from the free combat I. (Char would still be better, but...)
I like a larger permanent culture bonus for castles although this would be a minor thing
Both PRO and Agg could get certain Espionage boni (e.g. make espionage against a PRO leader far more expensive) but I am too inexperienced at espionage to have a suggestion.
One simple minor improvement would be to give ALL Agg units one free promo (i.e. a certain number of XP) from the start, instead of only combat I to melee/gunpowder. This would remove the frustration when playing an Agg leader with a horse UU or generally when having to rely on horses or siege and not profiting from the free combat I. (Char would still be better, but...)
I like a larger permanent culture bonus for castles although this would be a minor thing
Both PRO and Agg could get certain Espionage boni (e.g. make espionage against a PRO leader far more expensive) but I am too inexperienced at espionage to have a suggestion.