I managed to use teleport for 2-3days..
It was simply changing packets exchanged between client and server,
but since Dek (the dev) added some sort of verification with timestamp stoped working.
I was only choosing desired X and Y position, and on the instant I was whenever I wanted.
The best 2-3days there, I did multibox/bot alot,
I could simply check all boss spawns xD
and run way from pvp