There's no actual reason to run GNW Hinata pos1, since you don't stack her anyway. Even on low power.

Side notes: Don't use summon scrolls, unless you have collected all blue/purple summons manually from world map.

Also, get Iruka whenever he is available in event, as he is much better support then a Guy. Not only for your main lineup, but also for exams.

You could also make a decent Water main lineup, with what you have currently.