i find the MK I more useful recently. players are more aware of the dangers of disrupters, and i like to use the splash walls to hold off chargers and inkzookas while i splat them (or other times using the splash wall as a decoy while i sneak around and take out the enemy player from an angle at a distance. they're both great weapons, but i think people tend to ignore the MK I since the MK II is more easily accessible.I find a disruptor much more useful than a splash wall, although it kind of depends on the weapon. The Bamboozler 14 MK I with the Splash Wall is worthless to me, but the Bamboozler 14 MK II with the Disruptor is SO good and fun.
Nways, I want to say the Heavy Splatling/Deco are underrated weapons given how little people talk about them and how rarely I find fellow Heavy Splatling players in the game.
either way, with the very instantly usable MK III, i think bamboozlers will be MUCH more common.