Here's a list of weapons I dominate with & (I believe) are good weapons.
Splattershot Jr. - I love the Jr. cause it covers ink so fast & it kills people fast. It's really simple & easy, and the splat bombs are a nice touch. You also have the shield ;3
Bamboozler Mk 11 - I frickin' love this weapons SO much. It is so good. Even though it doesn't have a lot of range it makes up for it by its charge speed. You can kill people so fast! Plus you have the killer-wail ;3 You just got to know how to use it right. You charge it all the way, release, then quickly press the ZR button again & that kills em' faster then fast.
Gold Dynamo Roller - great weapon. It can one shot people & cover SO much ink. Even though it's kinda' slow it's still an amazing weapon.
Octobrush Noveu - kills fast, great range, good sub, good inker too ;3
Carbon Roller - any of them are good, wether the original or remakes. Their fast & kill people easy. You ink quickly & can do a lot of hasty ambushes.
The Longest Range Charger (sorry I can't remember the name. It's the charger with the longest range & it has blast bombs) - This weapon has crazy range & can one shot people. It's great for camping in spots & just picking off their team one by one. And, if people randomly sneak up on you, you can quickly throw some bombs at him/her and kill em'.
These are my main weapons that I destroy with. And there's a couple either weapons I use but these are my top.
Hope this helps!
God bless! ;3
Have you tried out the Sloshing Machine? it's kinda like the slosher, but the ink shoots further, and deals high damage. You can splat someone in 2 shots. The sub/special are worth using, the splat bombs are pretty deadly. xD
Every slosher kills with two direct hits.