Although you could argue that the Soda Slosher is a good Tower weapon, I would love to see this:
Slosher + Suction Bomb + Tenta Missles
I loved the Suction/Wail set on Splat Roller, but I feel as though the up close and personal CQC just didn't fit the kit well. With the spacing necessary for Sloshing Success, there wouldn't be any dire situations for Burst Bombs or a panic special, making a much more long range kit viable. Not only would it be able to shove people off Tower with Suction, if even a weak hit splashes anyone near the Tower, Slosher would have a beautiful follow up. If there's too many people on Tower to get close, just paint up (an easy thing to do with the Slosher) and fire off a quick Tenta Missle for easy pressure. Snipers in a hard to reach spot? Suction Bomb. Need to force your opponent closer to your Slosher? Suction Bomb. It would be a great thing to test out and use with the Slosher, since I am a sucker for Suction Bombs. The only thing that would still be a problem is Ink efficiency, but that's a problem with all Slosher kits soooooo…