Since the very first episodes of DBS it resulted clear that the 6-10-15 scale was not intended to be linear. Furthermore, when KK first appeared, it definitely sealed it.
Big numbers on linear scales become relatively small and close to themselves on logarithmic scales, and this would be exactly the case, allowing to to cover and fit to the story all the transformations that we have seen until now.
For example, on a log10 scale, BoG SSG Goku being 6 and Beerus being 10 means that Beerus would actually be 10000 times stronger on a linear (BP) scale.
Being said that:
- SSB Vegetto (vs MZ) = 10
He was stated to be perhaps greater than Beerus in the manga. With KK his level would be higher, not to mention that a current (ToP) SSB Vegetto would be much more powerful.
- Jiren = at least 10.1
On my current scale it means that he would be minimum 1.25 times stronger than Beerus (who is top 3 GoDs). 1.25 times stronger in DB> used to mean "STOMP". Also remember that a small step on a log scale is actually big with a linear approach. It is probable that, at the end of the ToP, I would have him even higher when he will show his full power.
- UI Goku (2nd appearance vs Kefla) = 9.7
I still have him at least 2 times weaker than Beerus at this point, but you can see from Beerus' face that he is almost there. However, if a supposed master UI is going to happen at the climax of the last ToP episodes, in order to match (or at least get close to) whatever a serious Jiren will have to offer, his level would definitely have to go beyond Beerus'.
- GoD Toppo = 9.4
The GoDs are not all equal in power, however it is clear that they have to be at least in the same ballpark. I have GoD Toppo (who is a beginner) placed at the low-end scale of the GoDs' rank.
- KKx20 SSB Goku (current) = 8.7
Simply, 20 times more powerful than his current SSB version
- Super Saiyan My Cabba Vegeta = 8.7
I have him equal to KKx20 Goku right now, however things could change after the new episodes...
- True Golden Freeza = 7.4
I have him more or less equal to current SSB Goku.
- LSS2 Kefla = 9
She was a beast, but, even if her last attack could have damaged Goku due to its "extreme, OP, cutting-laser-like" nature, I don't believe she could have matched him in actual BP. Indeed, at the end of the day she couldn't touch him and got obliterated by his Kamehameha. As for the other forms of Kefla (base and LSSJ), it it is imortant to remember that she fighting an extremely tired SSB Goku and she was even losing.
- Aniraza = 7.9
3 SSB tiers characters (+ 2 lesser ones) were required to match his power beam, so I have him a little bit more than 3 times stronger than current SSB Goku.
Bonus
- Whis = 15
This really makes you understand how much more powerful the Angels are than all the rest. LOL.
Master of UI, space and time manipulation, Whis is a beast
- BoG SSG Goku = 6
- Ssj4 Gogeta = 3.16
This is where I have the strongest being of the pre-Super DB continuity. He surely is a beast (I have him at a multi-galaxy level scale), but he cannot compare with DBS top dogs.
- Grand Priest = ?
Whis cannot even touch him, and he explicitly stated in the manga that he is strongest being in all of creation. Considering that Whis is not even the strongest among the Angels and that the GP tops all of them by an unfunny degree, I would have him at 20 or even more.