What is the age ranking of Shrek's four generations?

According to the plot of "Douro Continent", Shrek is one of the eight eccentrics of four generations, ranking third in age, nicknamed Shura with a Thousand Hands (later promoted to the title of Douro), Tang Hao with a vast sky, and the son of Ayin, a centenarian blue silver emperor. After jumping off the cliff, he crossed Douro continent, and then established Tangmen in Douro continent.

Ranking is a reflection of the objective strength of related similar things, with the nature of mutual comparison.