That depends on what you mean by "better".
The AI will use ladders and siege towers to attack the castles in siege mode. You (and other human players if you want) can join the defending team and the AI will fight to capture the fortress.
In Battle mode, the losing side will gain more units for the next round, thus winning three rounds in a row can be challenging.
As far as striking better or blocking better, not really. These are game engine items that are not altered.
Thank you for your interest.
modguys
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