Since a new server is not cross server (I think it is still the standard 2 months before it goes cross server), it depends on how many are doing ranked arena on the server. If your server has a lot of newbies, they might not even understand what ranked is and skip it until they understand why people are doing it.

Use dodge ninjas preferably shisui and masked man. You win most of the time and loss few. Note only whales can beat you having AGk or same lineup.

Really depends on your level and how far the server is. Usually once people on a new server enter arena, it is not uncommon for the fights to take 7 turns. Once you are clearly ahead of the competition you can do it fast.

Last but not least: if nobody is in ranked mode, you will be put up against a clone (bot) of a team that earlier played in the arena, so don't be surprised if you find yourself fighting someone who is not even online.

I did it at second week of the server,it took me 1 day to reach six path.Used suit Sasuke,cloak Sakura and regular Hinata,with lightning main.

With 4 alts is actually possible to...

Wait, that's forbidden!

And yet you still have people confessing about it when they report a bug.