If you're getting one shot by those guys in ranked battles, then you're definitely a lot weaker than them in general stats. I'm playing as strongest water in my server, and there's only 1 or 2 people I can't face up to, even though I'm only 6th or 7th strongest in the server.

Water can be unbelievably frustrating at times. But you just have to work out combos that suit you. I'm currently running a full healer AF, with poison tais, toxin, chakra blade, then Guy, Hinata and Suigetsu. Not amazing, I know. But it is one that from round 2, can interrupt annoying as hell Midnight blades and Scarlet Blazes, and take them out of the fight first.

If you're struggling against those guys who are lower levels, its cos you're trying to straight out damage them quickly. Instead, get a team that can interrupt, combo with your chakra blade to control, and disrupt that combo up in the 2nd round. Most teams like that at your stage don't have a backup combo anyway, so if you get first punch with someone like Guy, you are very likely going to win (assuming your power level isnt way too low).

* with it. Level 55 becomes a lot more fun for different strategies!