Massively weaker, alternative version of Nate created a continent-sized telekinetic bubble and threatened to obliterate Asia. Later in the series, Shaman Nate shielded himself from Qabiri's flames, which casually destroyed Earth-sized planet on another occasion. I don't want to talk about Savior Cable. Keeping up with Silver Surfer, destroying his indestructible board and multi-tasking at the atomic level is utterly impressive.
The main reason Hickman did not put these two into the Omega Level list even though both of them would blow Exodus' TK showings out of the water was because they did not originate from prime 616 continuity.