1) wait for ur server to be old enough for cross server arena(or if it is then join when other people r on/trying for ranked, it varies per timezone). server 2 we have a few hours where a decent amount of people r available, but around 6pm every1 stops doing ranked. thats not the systems fault thats just peoples schedules.
2) run a team with cc immunity and/or clones. hidan will kill himself attacking clones, and cant attack half ur team without tag so immunity to it helps alot. minato isnt that good so idk why ur complaining about him.