1 China’s AI does not fully research blacksmithing technology, although it has many resources (minute 44).
In addition, China does not research the University technology, the Archery Range, the Barracks and Clock Tower.
2 The AI of the Delhi Sultanate does not complete some technology although the research is completely free.
3 Rus AI does not fully explore the Archery Range, Abbey of the Trinity, Forge, University, Stables, Barracks, and High Armory technologies.
Also, the AI Rus hardly increase the total amount of Bounties.
The AI does not strive to accumulate 500 Bounties.
The AI constantly stands near the wall and loses his troops to archer fire. Instead of making a battering ram and trying to penetrate the wall or also bring his archers to the wall.
The AI does not place a garrison of Scholars in the Sultan’s palace to increase the rate of production.
The AI Abbasid dynasty almost never reaches the 3rd rank of the House of Wisdom.
Also the AI builds Mining Camp very far away from the resource source.
AI quite rarely build walls and very often do not complete them.
The AI plays very poorly on Сlosed and Water Maps
All AI civilizations seldom or never explore technology fully. For example, they leave some important technologies unexplored, as in the screenshots above. Even when the AI has a lot of resources.
AI also quite rarely captures and defends Sacred Sites and builds Wonder Victory.
Often when the AI has a large army instead of attacking it keeps the army at its base.
The AI never puts shooting units on walls .
The AI almost never destroys Trade Cart, thereby cutting off the enemy from additional resources. (We need to get the AI to raid the enemy’s trade routes). At the moment AI trades with impunity.
The AI builds a lot of trash units, and a lot less strong units. For example the AI is attacked by cavalry but the AI builds archers against the cavalry thereby wasting resources and losing the battle. There is no unit balance in the composition of the AI armies.
The AI of France does not build stables near the Donjon, thereby losing unit cost reduction.
The AI Delhi Sultanate never places Scholar inside military buildings increasing production by 100% with (Efficient Production) technology.
First the AI brings a few sheep to its TownCenter, and then it stops bringing sheep and the scouts run around the map with the sheep instead of bringing them to the TownCenter.
The AI rarely attacks with its entire army at once, mostly it divides the army, the AI attack because of the division of the army becomes ineffective.
The Chinese AI almost never uses all functions of the Imperial Official .The Imperial Official stops collecting gold after 30-45 minutes of play (the Imperial Official just stands there). Also, the Imperial Official does not control buildings (perhaps the AI does not use this function).
AI very often builds the Imperial Academy on the outskirts of his city . Because of this tax collection is not as effective. If the AI built the Imperial Academy in the center of his city then the tax collection efficiency would increase significantly.
The AI does not attack Boars for food (I have never seen it).
The AI of England is constantly misconstructing farms near his mills or does not get into the aura of the mill or is it completely behind the aura. Also AI builds only 2-3 farms near the mill instead of surrounding the farms for more effective food collection with a bonus. By the way, China also builds few farms near its Granary instead of surrounding Granary.
An example in the Delhi Sultanate:
The AI never hides his troops in the woods to ambush them.
AI Rus does not build a Wooden fortress near the forest, thereby not taking advantage of the bonus of a Wooden fortress.
The Mongolian AI builds buildings far away from the Ovoo aura, thereby losing the opportunity for additional research. The AI needs to build the most important buildings near Ovoo.
AI Mongols build Ger far away from the food source.
The AI of the Delhi Sultanate builds mosques far from the base, thereby losing the research speed bonus. Buildings nearby do not fall within the mosque’s aura radius.
AIs very often stop using traders. Traders will stand until they are killed.
When the game goes 40-50 minutes, many workers just stand there idly (the AI does not use them)
P.S After the latest updates AI play noticeably better BUT still a lot of work.