Alot of stuff kind of depends on what ninjas you get too. On my china server character I pulled a 3star Zabuza..now i can't tell who he plays well with since I cant read the moves. But the best main character would be who works with him really :p at least until i get better ninjas.

Can anyone suggest or post differnt builds?

any of the canon teams work well together, ino-shika-cho, sasuke sakura naruto, kiba shino hinata, ect. you need to make a team that fits your playstyle tho, if you want 3 tanks and a healer then make that team, it wont kill quickly but it wont die anytime soon either, if you want 4 dps to try and burn your enemies b4 they can hit you then make that team instead.

u have plenty of options to choose from so experiment and have fun with it, dont just try to min/max it.

http://smiles.vinaget.us/0_002.gif

Gaara and the Wind girl seem to work fine together, especially if you get him to 3* for that wind user buff and shield. Pair him up with Kankuro and another wind person and you'll do fine, though you will have trouble against all fire teams.

There is no "best build" today i faced a player same lvl as me, same ninjas as mines an i beat him and at the final i was with 48% health, so you cant build "best" pvp character i think

Actually, that can be due to a lot of things, equips-magentas-other stuff or just plain and simple good luck with crits.