I brought up a build almost opposite to Kumoko's speed build before, but it didn't work. So here's what I've been thinking.

So instead of going full mountain tank, how about a few legs in a commander playstyle? Like, still invest heavily in being a tank. But once you get comfortable and have no problem hunting and feeding, you get Egg Laying. Hatch just enough to cover your back and have them evolve the smaller taratect line with emphasis on thread control and durability, and ranged attacks. The offsprings are mostly for hoisting you up with their thread and overall increasing your maneuverability, but they can also work together to intercept enemy attacks and help you save up resources. It's not complete, but I'd like for people to find flaws in this build.