Today I met Morfey on arena who has something like speedhack. Think he's using it on boss rushes too. Want to report him but didn,t see any page where i can do that so I leave it here. This i the video: https://youtu.be/qjtyZG3Mjog
I've also encountered 3 or so players in arena using a speed hack. Funny thing is, even being lower CP than them, I can beat them about half the time. Hacks usually equate to low skilled losers.