By no means a slosher deco expoit, but I've used enough reg. and soda slosher =p
I would personally ditch the damage up. Even if you go full ham and get 3 mains and 9 subs, your sloshes will cap out at 91 dmg on a no-defense-up target, making surprise 1 hit splats much less likely than with a damage-up bamboozler... but I would imagine thatdmg up alo affects your splash wall's collision dmg so =p keep it if that is your schtick(kudos if it is)
So you can replace the damage up with speed ups(preferably swim speed for your kraken) defense up, tenacity etc: pretty much anything will benefit you except bomb range up. Heck you can even part with the ink recovery if you think you can fully handle the three seconds of no ink get on your own.
But if you like to get really ink happy immediately after deploying your splash wall and want more than 4-5 shots, you can keep the recovery and smoosh in ink saver mains.
So my silly S rank side says consider switching out damage up with whatever you want to try out.
My S+ tournament side says to get rid of damage up and grab more kraken power through tenacity/swim speed.