As this wiki has tiering as same as old version of VsBW , so can Omnipotence under following conditions reach tier 0 (where author makes it clear that author is totally aware that how strong an Omnipotent being is and it's any metaphor but actual Omnipotence)

https://archive.fo/3RVQO

Also explained here

What speed tier is crossing between timelines?

Quick question, a character is so fast he/she can bend/distort/twist/ time or can psuedo manipulate time through sheer speed, what speed tier is that?

I appreciate how Alien X is ranked as a 1-A tier here. He seems to be a character of controversy across multiple fan sites, and fan sites seem to be in disagreement over his power level, mostly due to arguing feats VS implied feats.