@DocFatalisWhat?!?! He has a lot of strength and durability. But he isn't unbeatable. A bloodlusted silver surfer would still give SA superman a hard time. This isn't a mismatch. Or ill come up for a defense for surfer and nova
Total mismatch: SA Superman was literally unbeatable.
SA Superman was a walking plot device. He was powerful enough to move galaxies worth of planets and fast enough to break into the after life, but his true power came from being able to pull random plot devices out of his ass similar to Mjolnir and the Power Cosmic
Still, Darkseid solos. SA Supes could theoretically solo too but he has just as many low showings as he did high one's.