The first downscale comes from Goku implying he’d he able to
help against 2nd form Frieza which we attached to his KKx10 state (on his
profile)
So then we get his base
power level of 90k and kaioken would make that 180k
Vegeta’s Oozaru’s base being 18k and his Oozaru
multiplying his bp to 180k
Vegeta would be 1/10th of oozaru in his base
and Kaioken x3 Goku is
comparable to Base Vegeta
In base he would be 1/3rd of his KKx3
This
scan was the argument for scaling to early Saiyan saga, but as Crim pointed out it’s unusable. So, the downscaling would stop at late Saiyan Saga from Base Goku with PL of 8k.
(Imo it’s kinda weird to scale KKx10 to second form frieza, but that’s how we currently treat it; he would scale above first form frieza either way though. I’m just here to present the information).