Well, there are almost no maps with "good" AI path markers.
Even the original maps have no good markers.
I guess no one is interested in making AI markers. Also the actual MAP making Tournament is excluding AI markers from the tournament.
There are some maps in the Vault with "TeamPlay_AI" inside the name.
Those maps have AI markers added.
I will not say that the markers are not good. But to test my AI i had to fix some markers there.
Actual i am working with svenni_badbwo together to make some maps with propper AI markers.
If you need some maps with good markers try the latest maps from svenni_badbwoi's maps topic:
viewtopic.php?f=53&t=14976