I haven't used this account in the arena yet. I have an old account on another phone that I used to play in the arena but my cousin is using it now. I was pissed and frustrated in the arena before, because there are lot of cheaters and I mean a lot. Fair play is 50/50 at those times so I stopped. I dont know when will I start to battle again but I think I will when I see it fit to do so.
Dont know how they got their high ranking so high. Maybe because they play a lot and wins most of their battles. Being active in arena plays a part of it I think because someone I know had his rank moved lower even when he didnt lost for some time and just didn't play for a while. Other than that maybe they're cheating