Tier 1 - extremely skill demanding with good OCB required, luck plays a factor but good consistency mitigates that, basically levels that were DESIGNED to be speedran
Train
Facility
Silo
Control
Bunker 2
Tier 2 - good levels, just fall a bit short of the tier 1 levels
Jungle
Caverns
Aztec
Frigate
Bunker 1
Tier 3 - semi-irrelevant levels, some patience and luck required but nothing terrible and skill is still a factor
Surface 1
Depot
Streets
Archives
Egypt
Tier 4 - completely irrelevant, boring, mostly luck-based or patience required, 0 difference made if removed from the rankings, aka the derelict tier
Runway
Statue
Surface 2
Cradle
Dam
Some of them may seem overrated or underrated, but remember that this isn't only related to the strength of WRs on the levels. Dam SA/00A have really good WRs, but overall the level is dull with 0:53 being the most irrelevant record to have existed on the planet, not fun to play and has silly factors such as PP7 lag, randomness of the gate, etc making it a 2/10 level where having a good time means you are a degen.
Create your own list if you want. Note that I designed my list so that there are 5 levels per tier. It doesn't have to be that way.