Awsome server but indeed botting is a bit of problem there.
First - server use extibia so all the bots that were working there are working as well. Take blackdproxy (open source), add 0x01 to the packet structure, update classname to the UbiaClient and you have working blackdproxy...
AntiBot client - same client as on classicus , just switched the image and ip... Exactly the same client
Find someone who will make it a bit harder to break and update the client/server side code frequently.
There is even free version of otclient for classicus available which requires very small modification to work on Tibianus... Don't understand how someone can sell it....