@SweetBippy Hey whatsup. I'm Hitzel, the guy from the Zimi video.
I don't mind giving you some advice, but let me start off saying that playing a support role isn't really meant for solo queue (Ranked Mode). Things won't always work because they generally require coordination and synergy with teammates and that's something you simply can't rely on in solo queue. It's up to you to not get upset by failure and be able to judge how well you're actually doing separate from what the game's result is. Simply put, just have fun and learn.
Being a support player means making your team better and making the other team worse, and doing it in a way that doesn't stop you from carrying your weight.
I'm going to tell you right now that you are going to have a lot of trouble doing this with the vanilla Inkbrush if you want to do it in solo queue or outside of Turf War in general. I am going to give you some ideas for using the Permanent Inkbrush as a support weapon in solo queue, because of the Innkbrushes I think it has the kit to be a support weapon in a solo queue environment, and it's the only Inkbrush that I actually have faith in being able to carry it's weight.
I think that the permanent Inkbrush can pull off the double Splat Bomb build or something close to it. This means one of two builds (Just go for B if you don't gear edit.):
A - exactly 3 mains and 2 subs of Ink Saver Sub, and as much Ink Recovery subs as possibly and maybe a few subs of Bomb Range (3 or less).
B - As much Ink Saver Sub and Ink Recovery as possible with a few subs of Bomb Range.
I know I am biased to bombs being used for a supportive role but I actually do believe that the build is viable.
The problem with the vanilla Inkbrush is that it's great for Turf War because you can avoid the enemy and paint where the enemy isn't currently looking, but in Ranked Modes you HAVE to be able to confront the enemy directly. The Permanent Inkbrush is able to spam Splat Bombs to control space and help teammates get easier kills, all while building up Kraken and being able to turf uncontested ground quickly. Once you have Kraken, you can make plays on the objective or go for flanks by cutting through enemy ink.
The most important thing about playing a support role in solo queue is making sure your teammates understand what you are doing.
This is key! Pick a teammate with a good slaying weapon. Give them a little squidbag and a booyah, follow them around at the start of the match, and spam Splat Bombs at whoever they try to fight without getting yourself killed and watch his back. Don't follow them around all game, but do some of this with each teammate so they understand what you are doing, and be sure to come back and remind them over time. This lets your teammates know "Hey, this guy is going to support me with this bomb strategy, now I can make decisions based on that and work with him." Being a supportive player is useless if your team doesn't take advantage of it, and this is how you get your team to take advantage of it in solo queue.
In general remember to stay alive, and outside of showing a teammate "Hey look, I can throw 2 splat bombs!" you generally never want to throw 2 bombs aside from situations where throwing two bombs is going to accomplish something (and I'm assuming you don't gear edit, so you probably won't be doing it anyway). What you want to do is gradually throw your bombs over time, never letting your tank fill all the way up. There's a little "WHOOP!" sound when you get enough ink to throw a bomb, your ink tank flashes white, and a red light glows on your back. Use that to know when you can throw a bomb, and whenever possible, find opportunities to wait a little bit longer to throw another bomb so that you can build up extra ink for when you need it. This will allow you to output a steady spam of Splat Bombs over time without being on empty too much. Throw them in choke points where they really can't be avoided, or throw them at enemies who are trying to fight a teammate. Control space for your team and make it unfair for the enemy team when they try to get kills by placing Splat Bombs at their feet.
Maybe most importantly, don't forget that you need to spring into action at the right times, you can't be too passive! When you see opportunities to get aggressive, or sometimes when you simply have Kraken, you need to be able to shift gears into "Kill Mode." You also need to be able to punish people who try to come stop you from throwing bombs ─ when people try to flank you or a teammate, punish them by hiding in ink and jumping out at them in an unexpected way. Being able to get these kills will compliment your spacial control and firefight support with good old fashioned kills that take advantage of the Inkbrushes short range, in addition to making critical Kraken plays.
Hopefully this helps you to get some ideas of how to use the Permanent Inkbrush as a support weapon. Have fun!