At some servers i have played which are at the top15 of hopzone that works.When you get into the stadium don't move just take the buffs u need.Stay there where u are,u will be behind the olympiad buffer.When the match starts u see that the buffer is hiding but ur enemy can see him.So if u r range class u have an advantage because it will become hard for your enemy to target you,and when he will finally target u you will have lose him a lot of hp and then u will have 80% chances to win!