Could we maybe get some summons? I could help you a lot better if I knew what kind of chases could go on. :)
Other than that, I'd suggest definetely having Water Main, Sailor Sakura, and possibly Sai and Haku. The other commentor said it best tho, save up your seal scrolls until you hit level 70. A lot of those ninja outdo Sage Naruto, at least in my opinion. Ao would be an amazing addition to a water main team.
Skills for water main would be: Water Shark Bomb as a mystery, healing as a standard attack, Neurotoxin, Water Clone Jutsu for now, and as a chase, I would either go with the Knockdown to High Float with the monkey summon, or the low float to repulse if you choose Haku as well. So my idea for the team would be something like this placement wise (replace Lightning Main with Water Main :p.)

Also, as a response to your other question, Kimimaro is definetely worth farming up, as I've heard even in the late game he's a great ninja, and at this point I can tell you it's true, he's on my main team right now, I'm working on getting him 5*. As for Hinata, she's always useful, She doesn't become as useful in the late game, but she still has her uses. Soaking up hits and an accupuncture in the chase can never do you wrong!

Ah, you're right, Sailor Sakura's standard attack completely slipped my mind there. Either way you would be good. The water clone jutsu will accupuncture and for sure give you a chase as long as it hits a ninja that can be chased. However, I would go with the Poison Tai, as that's what I used in my old water main build. My original thought was also that the clone would soak up some damage, but of course, that's what Sai is partially there to do.
And those summons should work. The summon you should use is the Illusion crow.
So your chase would go: Water Main Knockdown, Sai Repulse, Sakura High Float, Water Main Low Float (from summon), Water Main Repulse (from chase), and then Haku Low Float.
Another way it could go from Sai causing High Float with his clones is: Sai high Float, Water Main Low Float (with summon), Water main repulse (with chase), and then Sakura High Float. The second way won't get you as many floats, but something is better than nothing, and you should more often than not be getting floats started a different way anyway.