...What are you talking about? We don't need Lostbelt 7 to understand how strong U-Olga Marie is that she would wipe DBZ off the map without TOEILand feats...
The basic concept and gist of a Beast alone would give U-Olga solid Solar System+ backing alone, this is before we count that Lostbelt Zeus was planning to run away despite the fact he's capable of Anti-Star System attacks. The fact that U-Olga can casually spam Black Holes also requires a fuckton of magical energy to even try and do:
Basically using enough Magical Energy to do an equivalent of that and make one be 50 Kilometers at that? And casually? Yeah no.
If you DO include Lostbelt 7 including the fact she was HEAVILY holding back her actual power and Nasu's statement that U-Olga could take over Lostbelt ORT if she was at full power, I would very much say you would need TOEILand minimum for a challenge or DBS for a stomp, she just throws out a Black Hole like Evolt and kill everyone everytime.