Look at it more like this: you're a support role. You are bursty and can cover a lot of ground really quickly. With vanilla inkbrush, you can use sprinklers to make a nice safe-circle for your allies and an annoying place that needs to be dealt with for enemies. If you're determined to be offensive with it, you can bait opponents with an annoying sprinkler then, when they come to take it out, you can kill them and just place another.
First, master jumping mashing and shot mashing at the same time. The jump will get you a little extra range while you swing the brush with wild abandon. Do that before you try the rest of the stuff.
Anyway, don't worry about hiding with the brush, in ranked at the very least, you want enemy attention. You're the hardest to kill for a lot of matchups, because you can dance around like nobody's business. To keep this up, trade out the Tee for something with Ink Saver (Main) so you can stick around as long as you can.
But why do you want everyone's attention? You aren't a powerhouse. Unless you get the drop on someone, yeah, you're not gonna be running around killing everyone (unless they're all really easy to surprise). No, what you do, it ink in bursts. Learn to mash and fast. You can ink up a huge empty area faster and in a more annoying pattern than most enemies can cover. That, and you can dance around enemy territory with a well-done dash.
So:
In Turf Wars, find the most enemy-colored area and just have at it, leave a sprinkler and bounce (usually the same way you came). If someone comes to attack you, avoid engaging. You'd probably lose unless you're to their side and/or they're aiming at someone else, anyway. Find the next useful area, and rinse and repeat. Leave sprinklers in areas near spawn when you're there early game to cover as much area as you can.
In ranked, leave a sprinkler near spawn in the beginning--this will charge your special without taking much time out of running for the tower or the splat zone. In Splat Zones, as a support role, you usually have to trust your team to hold the area. What you can do, though, is make it hard for the enemy to come back to the zones.
Leave Sprinklers in enemy base and cover the way back so they have to undo their work. Better yet, get them to notice you and dance around their shots. Only return fire if it's obvious you can take them out without much hassle. As this goes on, you'll be holding off two or three, so just distract them as long as you can until it's too dangerous, then get out. Inkstrike zones to stop the timer when you can--especially when your allies are gaining control it/them.
If you need to go on the offensive, find a safe place to camp the zone, leave a sprinkler and go fishing. Someone will come to take out the sprinkler and when they do, you'll have to be there to take them out and leave more bait.
Inkbrush Vanilla isn't that great for Tower Control--at least as I've found--but, typically, doing the first support role can really help when team knows what they're doing. Making it harder to get back to the tower or catching foes from behind can turn the tides for the better. Unfortunately, camping the tower is typically out of the question, if you're not manipulating the speed the inkbrush grants you, you're losing on nearly its entire kit.
So yeah, those are some basic tips. Do with them as you will.
