I don't have hanzo and i tried to make teams to replace him but to no avail lol. So I came up with this broken team still trying to improve on it...any and all suggestions welcome :-).

Replacements for hanzo are gakido or yagura.

P.S. imho skewering is better in general than shark bomb. Because this team if faces a full immune team like a mb row a bd flower guarded or sb 4th mystery one doesn't do anything for 1/2 rounds (I'm talking about the f2p version that is not at all this f2p since hanzo still have to appear in an event at a price a f2p can buy in less than two months of gathering, otherwise, with this f2p way to think also edo deidara and shark kisame are for f2p)

in ranked arena currently if i face a bd is with flower guard, if i face an sb is an sb with 4th mystery and if i face an mb is an mb with root of warrior.

You say people don't use anymore root of warrior, but if you are running lightning treasure blitz or ay 4th, samui, darui blitz with MB you run it with root of warrior and those are pretty common now.

I don't know in your bracket but in uk bracket is so, so what Zelgais said is actually true. If you use shark bomb you just risk to not do anything against those teams.

P.S. About the shark bomb blitz team: The meaning of a blitz team is to deliver a ton of damage asap so using neurotoxin and healing jutsu makes no sense, because neurotoxin means no water enhancement or no nature energy gathering. There's mei to cc in that team. Using healin jutsu means that azure fang self heals if she is the fastest and that doesn't add any further damage, thing that doesn't make much sense. Better to use one of the other standard attacks in this kind of team.

P.P.S. Tenten gnw gives +15% critical chance with her passive and is a water character. Is a must have ninja in any fun water main team that bets on deliver chaos with neurotoxin