Some information here contains minor spoilers so read at your own risk.

«Mixedblood ranks»

> Zulu

> Serial

> Gilberk

> Martial

> Falcon

> Echo

> Kilo

> Delta

> Beta

> Alpha

> Beacon

> Evolver.

PS: Each rank has four steps.

(Evolver is not the highest rank. There's still a hidden rank that will be revealed later)

Mixedbloods are the combination of humans and Slarkovs who can perform superhuman feats.

Mixedbreeds are mutated earth beasts that also have bloodlines similar to mixedbloods within them.

Cosmic Superiority stages >>>

«Sub Parallel» 

«Parallel» (MC current stage)

«Transdimension»

«Polarinterdimension»

«Interomniscience»

MBO Official Rank "

> Private

> Tistle

> Lance

> Gant

> Argent

> Lieutenant

> Mil

> Captain 

> Major (MC current rank)

> Gradier

> Major Gradier

> Commander

> General

> Grand General

> Grand Commander

Every rank has three stages that needs to be scaled before moving onto the next rank.

MBO missions rank from lowest difficulty to highest "

☆

☆☆

☆☆☆

☆☆☆☆

☆☆☆☆☆

☆☆☆☆☆☆

☆☆☆☆☆☆☆

☆☆☆☆☆☆☆☆

SILVER

BLUE

RED 

PURPLE

BLACK

Highest level basically means universal level disaster and there have never been an MBO mission with that level of difficulty. 

(Comment below if you'd like for more information to be added.)