I'm gonna say that skywars most likely isn't going to be getting any players. It's way overdone on servers and it's hard to have a polished and also an original system in place. Even if you manage that, a number of people will hate it because it's different.
So, coming from someone who can't parkour to save his life, here's how I'd imagine a rank like that would work.
*If* you were to complete every course, you would get that rank. I don't think there's a problem with having an actually prestigious rank at all. In fact, I support it. It is...
#Legend100
TrueAmerican
You should really think about doing something like this on skyblock or something. Not to this extent bc honestly it's op enough as it is, but at least something. Plus I still literally haven't hopped on survival hehe.
I figured I should probably do this at some point or I'd regret it later.
I'm TrueAmerican (not to be mistaken w/ my amigo FakeAmerican) and I play a lot of skyblock. Along with exploring other servers in manacube, I've been making an effort to hang out more on the other platforms of manacube...
I feel if a system like /prefix was interested it would essentially be a custom tag. That could possibly create confusion to newer players to what rank you actually are.
The custom colors would be kinda cool maybe, but I'd personally like it to be toggleable cuz I feel like chat would be too...