Here are my preferred setups:
Ranked Battle -
Tower Control: Heavy Splatling, .96 Gal, E-Liter, Dynamo Roller
Ranked Battle -
Splat Zones: Heavy Splatling, N-Zap 89, Aerospray RG, Dynamo Roller
Turf Wars: Heavy Splatling, Aerospray RG, Splatshot Jr. (that darn starter weapon), Octobrush
EDIT!! BIG NEWS!

Originally Posted by SplatoonUS Tumblr OFFICIAL!
NEWS FLASH! Tomorrow evening at 7 PM PT, a new mode will join Splat Zones and Tower Control in the Ranked Battle playlist!
Introducing…. Rainmaker! In Rainmaker, both teams compete to snag the, uhhh, Rainmaker. Once you’ve got it, the goal is to carry it into the other team’s base!
How’s it work, you ask? As soon as the battle begins, grab onto that Rainmaker! It’s guarded by a shield, though, so you’ll need to bust it out first. Once you snag it, head for the other team’s base. And be quick about it!
If you run out of time or get splatted, the Rainmaker will be dropped and its shield will also reactivate. The Rainmaker is crazy heavy, so you can’t Super Jump while carrying it. Hopefully your teammates will watch your back!
But don’t think the Rainmaker is just some shiny object - it can shoot ink like an Inkzooka. You can even hold to charge the Rainmaker up for an extra-powerful shot! The closer you get to the enemy base while holding the Rainmaker, the lower your goal distance will drop. If you retreat too far while holding the Rainmaker, it’ll explode sooner! If the battle ends without anyone carrying the Rainmaker to the goal, the team with the lowest goal distance will win.

Also that hashtag.
"I dare you to make it through your first battle without yelling MAKE IT RAIN!"