Currently, in 3.0, arena has a level gap restriction of 10. If you are level 55, you can only meet players lvl 45 - 65, for borth training and ranked. You cannot ever meet someone lvl 66 or higher. This means if you have a half decent team and initiative, you can grind to 6 paths.

If you are level 85 or higher, and do not have much initiative, getting to 6 paths becomes infinitely more difficult (if not impossible) without cheating.

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The region also play a big role. In UK, I win init in the vast majority of situations at 13.2k init, at super kage. In LA, I lose init more than half the time at 18.6k init at super kage.