Armies in them are better represented by the common tactic of a ranged unit in the city.
It would likely only be a small garrison manning the city...and the city bombard already shows that.
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@Callonia
To repeat myself again, they are unchanged in terms of attacking units: the mod only changes attacks on cities.
And by what logic does enabling a tactic for them trivialize them?
Melee units still work as a wall for ranged, and it is still a potent, dare I say ideal combination: but it should not be required to take unguarded cities.
Yes, you are trivalizing the melee units by making them take no damage from attacking cities.
If a city doesn't have any of the defense infrastructures built then it is hence, unguarded. Which is represented by how easily they can fold to melee units. But if a city builds any of defense infrastructure then it is guarded as represented by permanent unseenable garrisons manning them.
But here's the catch, it isn't invincible. It will always fall to a real attack not halfassed rush. But it'll only fall if you are unable to reinforce it and be present in strength. As you can see in the screenshot, AI made a halfassed attack and paid the price for it. If Huatama brought like three more vindicators and spent first 1-3 turns bombarding the city then the edicts would rush in and bash the city away for capture.
Even if Huatama had succeeded in taking the city of Aquaria.... he won't been able to keep it anyways. For I have a large fleet dreadnought/cannonades that is roughly 3 turns away. We're talking in the area of 20+ ships protecting my aquatic cities.
Only if Huatama bruoght like 40-50 ships that is like at least half edicts and vindicators.. I would've been in for a real fight. If he brought 100, I would've gotten overwhelmed initially but after that, who knows.
And plus the faction i'm playing in the screenshot is North Sea Alliance with an boost of 60% strength for aquatic cities yo. Their cities is much stronger than average cities. If I remember right, Aquaria is now at 242 strength.
If the attacker wants to overwhelm the defending forces, general rule is to bring three times of what the defending side has.