If I were to estimate a bare minimum, ofc using some headcanon speculations of how I like spacings to be, a bare minimum would be 1.8x between Pui Pui and base Vegeta.
Like said, Babidi needed to have some expectations of the Saiyans based on how badly and easy dealt with Pui Pui was. We don't know how much Babidi thought for that kinda domination to occur is the problem, but let's assume an usual 1.5x gap which is the notable one for utter dominance without any effort at all, ala Goku vs Ginyus:
Pui Pui 1,000
Estimated Saiyans 1,500
Then he calls Yakon and thinks he'd deal with the 3 of them easily. Dabra is frustrated he won't get any chance, but agrees gathering the energy is the priority. This may imply that weren't for Yakon, he could still have to act and have his fun. So Yakon is able to beat the 3 estimated Saiyans whose powers can easily beat Pui Pui. Since Ginyu figured Goku as 60,000 as a level capable of defeating the 3 Ginyus ~ 40,000 let's use the bare 1.5x minimum for Yakon again over the estimated Saiyans
Pui Pui 1,000
Estimated Saiyans 1,500
Yakon 2,250
Then Goku ties up with Yakon in base, seemingly. I generally have Goku 1.25x stronger than Vegeta under same states, so Vegeta would be 1,800 bare minimum going by my preferably spacings.
Pui Pui 1,000
Vegeta 1,800
That'd be the bare minimum I'd go. Can work too. Putting that in the power levels I have for this portion would be
Pui Pui 330,000,000
Vegeta 600,000,000
I don't think I need to go higher than this for the gap either. It fills the needed requirements so I have no need to put Pui Pui there wayyyy below. Could be, but I think going with the bare necessary is cool. But yeah, the bottom nobody knows, not even Toriyama from that time.
Pui Pui would be about as strong as androids saga SSJs and base Vegeta would be in-between android 17 and android 16.
Probably if I did those power levels on other forums and in other places like youtube ppl would call me crazy for placing Pui Pui at androids saga SSJ levels because he made a big deal out of 10x gravity, but those ppl know nothing and can't try to think outside the box a little.