1. super saiyan
2. mystic saiyan
3. mega saiyan
4. ultra saiyan
1000. millenium saiyan
infinity. infinity saiyan
no absolute limit. God saiyan or ultimate saiyan
everything imaginable, unimaginable, etc.. beyond this. omni God saiyan
Fusion of goku and vegeta = gogeta (potara) vegito
Fusion of no absolute limit saiyans including goku, vegeta, trunks, gohan, broly, gogeta, vegito, etc.. = Savior