Okay guys you don't want to invest money into developer time to fix this issue, which will only be cracked again,,,
The main issues with bots is the world coordinates, just change them regularly,
add a +1000 on Y that will screw every script out there each time, and keep changing them..
Next point you want cheap,, then out source to India tech company and hire 10 online gamers that play 24 hours a day and all they need to do is jump around all the dungeons in invisible mode and kick all the bots they see as you can give the team the admin tools to do it.. it cheap and a 100% as they can jump from boss to boss in all the dungeons quickly...
If you don't want to fix your problem that gee every other MMO has which you seem to totally forgot to do from the start then use cheap recourse from another country like every other big company does!
You will have a 100% guarantee fix here, add more staff at the start and then reduce as you notice the work loads drops and you will make a very happy gaming community, as honest to say I am already that close to finish my trial month and stop the account and come back in a few months ...
Best Regards
A Unhappy gamer....