Alright, so here's what I find to be the optimal way to go in Arowana Mall (I'm using the dojo for that since the map didn't roll in online):
Here's the starting point. While splatting ink around, you'll want to go to the left slope.
The one right here. Not shown under there is a huge square you can ink. With that done...
The hard part, getting this jump right. You won't do it in Inkling form, the squid is imperative. Splat left and right then keep going.
You probably weren't able to ink everything on the left side of the previous pic, that's why right after the corner, there's an opening where you can finish your job.
After doing so, just paint everything you can and follow the path.
You'll finally end up in this location, which is more or less the center of the map, and you'll be ready to destroy the enemy team with some DEATH FROM ABOVE !