As Teezar stated about infinite universes in the post-crisis era. That's why Dominus was able to show the madness of infinite universes to Superman. But, to return to the topic at hand, I stated that it should be considered for Low 1-C because the Worlogog terminated the timestream prematurely. This is a direct feat that should validate the tier listed on the DC Cosmology explanation blog.
Position of Timestream in DC Cosmology
Doctor Fate faced Mordru before facing Extant and proved to be on par with him. Fate's power level varies widely, therefore scaling him must be done carefully. I even looked at Sandman's Fate revision thread, but it never came to a conclusion about his downgrade. Hector Hall is still classified as a 2B entity and Lord of Chaos like Dominus and Mordru are being treated as 2A. One thing to note is that Mordru was very powerful at the time he fought Fate Hector Hall because he was hunting down the Lord of Orders.
Mordru hunting down Lord of Orders
Dominus, the Lord of Chaos, is capable of manipulating endless universes at command, and Mordru is the most powerful of them all.
Hector Hall fate is 2B
https://vsbattles.fandom.com/wiki/Mordru
To be honest, I find Doctor Fate's scaling to be somewhat strange. I'll try to write a blog about his power levels as soon as my reading of Fate appearances is finished this month.