So my issue with the E-Liter, Inkbrush, etc. loadout wasn't the E-Liter. Sure, there were times when the long charge time made things hard, but I actually like using Chargers in Salmon Run. My problem was the Inkbrush and the lack of weapon knowledge from my teammates that time around. I can make due with just about anything, with a few exceptions. The brushes being the big one. I can't stand any shift that makes us deal with a brush. Not only is it a pain on my fingers, but they don't do nearly enough to be worthwhile during the chaos that is a Salmon Run wave.
As for the issue with the Stingray, I am aware that it isn't very good when you are already in trouble, but that is a special that you aren't using reactively (don't know if this is a real word) to make a difference. You use it proactively to take down things before they get too out of hand. You need to be able to think one step ahead. See that Flyfish spawn over the grates in Lost Outpost? Stingray! No one able to reach that Stinger that is causing havoc and disarray amongst your crew? Stingray! Need to clear a lane for your team? Stingray! Need to put some better toppings on your ice cream sundae? Stingray, why the heck not? The problem that I am seeing with the Stingray is when to use it. It isn't something that you pop in reaction to things going poorly. You need to use it before that happens to make things smooth. Of course you don't use it when you are besieged by a horde of angry fish people. That would be suicidal! Don't use it to turn the tide. Use it to keep the tide from turning in the first place.
If I may offer a quick defense of the Glooga Dualies, remember that they deal way more damage after a roll during that "turret" mode. That firing pattern makes short work of bosses and clears many paths of the Salmon menace! Now if only it could fire a little faster... All in all, I thought that the worst weapon in the x2 blaster, x2 dualie composition was the Rapid Blaster Pro. I just found it to be too slow and not damaging enough for what Salmon Run is. Good range though. Had no trouble with Steelheads whenever I had it. But I think part of my problem with this loadout wasn't the weapons themselves. I play with a good friend of mine who means well, but is generally not very good at Salmon Run. I don't want to tell him to get lost so I can focus on raising my rank, but more often than not he is the weak link of my crew. Leaves me in a bit of a conundrum honestly.