The AI seems to struggle a LOT with the Siege Tower in regards to climbing it
They use mostly only the middle stair out of the 3 of them and usually one troop will stop another troop from climbing up, making it take forever for even a minimal amount of troops to climb up.
In order to fix this should agglomerate a bit farther back from the tower and start arranging themselves in 3 lines, each line climbing their own stairs, waiting for the next troop ahead of them in the line to climb a bit before going for the stairs themselves.
This organization should make sure the optimal amount of troops will reach the top of the tower and that they will not stop one another from climbing up, making sure that all 3 stairs are being used at the same time.
They use mostly only the middle stair out of the 3 of them and usually one troop will stop another troop from climbing up, making it take forever for even a minimal amount of troops to climb up.
In order to fix this should agglomerate a bit farther back from the tower and start arranging themselves in 3 lines, each line climbing their own stairs, waiting for the next troop ahead of them in the line to climb a bit before going for the stairs themselves.
This organization should make sure the optimal amount of troops will reach the top of the tower and that they will not stop one another from climbing up, making sure that all 3 stairs are being used at the same time.