I don't know if someone noclticed it already but here is what I noticed:
I was just fighting in the new arena when my killstreak timer went down to one minute left. After i fought i noticed the timer for the killstreak went up to 10 minutes again without reseting my killstreak.
So here is the tip:
Wait until you have full arena energy, then fight your first time. After that it will take 25 minutes to regain that one arena point. But before the 10 minutes of your killstreak are down to zero, you fight again so that you have again 10 minutes at your killstreak timer. If you did this 2 times and wait another 5 minutes, you will gain one arena energy.
So you are having a streak of 2 wins now and you got 4 arena energy. If you win all your fights you can get up to 6 wins which enables 2 arena energy as a reward.
You can rewind that couple of times and maybe get a higher reward and a longer killstreak which means much more points.
I hope you guys understand what I am writing! :)
Tell me how you get along with this and if its worth using it.