Main - Ogi - Water shark bomb
Haku
Zabuza
Hinata
Formation:
Top Middle - Main
Top Right - Haku
Middle - Zabuza
Middle Right - Hinata
This way, Zabuza can make his clone in front of Haku to block from attacks.
Main with water buff and Haku buffs with crystal ice mirrors first turn.
Combo effect can happen any turn as long as there's low float so any character (except hinata) can initiate it.
Combo:
Haku Start: Ogi into low float > Main with water dragon into repulse > Haku into Ice needles with low float > Zabuza with ice dragon into Repulse > Hinata with acupuncture chase.
For whatever reason it works best with 1star hinata since she's slow and she'll chase last.
It can still work with 2 star hinata, just hinata will move before your main if they haven't been 2star.
Hope this helps Water mains!
And with water shark bomb hinata can chase.