Suigetsu should be much better for water main.

water main, sugetsui, Haku, and iruka/buffer

Or, main, Chojuro/Suigetsu, Haku, GNW Tenten

What i ahve so far that i feel is working "ok" is:

TenTen: for critbuff and chase that triggers after 10 combos
Suigetsu: 2 attacks + mystery skill
Haku: increased damage by 40% but cannot kill (dont matter on 9tail) and her mystery that buffs all water attack and nin by 40%
Main: My spec 2, 3, 4, 1, 1
Pet: TonTon but i was also thinking of chamelion since both its attach hit the 9tail, will try next time with it.

Formation:
TenTen X X
Sugetsui X X
Main Haku X

i just made a thread asking about this :D..

ok so i use tenten/water main/haku/chojuro...
my question is

1. Is suigetsu better than chojuro? (maybe if he is 5*?)
2. Is kisame better than tenten? (kisame shark bomb allow me to * 40 chakra and i c*e 2 sharkbomb 2nd round
3. is asuma WB/guy also good with water main?

I would think that Chojuro is the better choice here over suigetsu due to his increase in water damage.

Furthermore im not sure if kisame shark bomb work with 9tail (* chakra) since he is immune to all status. but try and replace tenten with kisame next time

If it was me i would avoid Asuma WB since you have so many other character that is water and using him would be a loss of the buffs you are getting from the ones buffig waterdmg to the team

Just my opinion thought :)

Kisame does * 9tails chakra, so i c*e 2 shark bomb on 2nd round..
I was a fire main and i dont have enough stamina to awaken my suigetsu, i will try to get him to 5 star, probably he will hit harder than chojuro 3 star

I am rank 1 tails as 4th in power on my sv with AF,mei,wb asuma, iruka, but i swapped iruka for chojuro and recieved a dps increase even more, i do around 110k crit with the new mistery.

If u swap iruka with chojuro, dont u lose the shield that will help asuma WB buff?
What talent do you use?

iruka, gnw tenten and chojuro

iruka, chojuro and mei

iruka, gnw tenten and mei

gnw tenten, mei and chojuro

those are pretty much wat i see on azure these days for WB

I run AF, GNW tenten, Haku and Kisame, if u use Kisame wisely u c*e every mystery.

https://www.youtube.com/watch?v=Ff_Pn6m0I1g

like BroJimin said, I strongly suggest you to get at least GNW tenten and Iruka, and I prefer Mei cause she's a beast ( don't have Chojuro so I can't comment him :) )

i think this is the most optimal team for water main,,sadly i dont have mei :(

Well for OP's original question, why not go with someone like neji/GNW neji if you want another earth cursed ninja?

do you have a more......f2p version lols

If I use Azure, Tenten GNW and Haku, is it better to go with Suigetsu or with Kisame?

You can test that by yourself but i don't think you will increase your dmg by some significant number.
I ran it with both,Suigetsu have double normal attack and tag (if it tags kyubi at all idk for certain) against Kiseme's chakra steal ( double shark bomb, or skewering and shark bomb if youre 80lvl).

You c*so test using guy for example and see how thats going,he was good before update idk now didnt test it.

I runes team with suigetsu but normal 3 star tenten,with skewering and monster strengh,and that 10 hit chase,since tails was nerfed i can tell you i did around 400-450k dmg per round.But that finishes in 5mins... :(

good power team is
water main, mei, mabui, and gnw tenten
gnw tenten can skill round 1 plus water main and meis boost and crit boost
mei skills round 2
water main and mabui round 3
gnw tenten round 4 and if you time it right mei also i believe
and tne retreat or keep going since attacks arent linked to hp like with asuma wb

you lost the mei barrier but you still do great damage and keep skilliing every round wit someone

Thats if you're lucky and got mei as a rare.