Here Yuka said that Gilvallis is still incomplete. So after Gilvallis was defeated by Geed it was in an incomplete state as it was still trying to find material to repair itself. But yeah this was why a lot of people are confused about the scaling between Geed and Gilvallis. So a complete Gilvallis who was revived by the Devil Splinter was soloed by Galaxy Rising Geed. But an incomplete Gilvallis was able to match attacks from Galaxy Rising Geed and Beta Smash Z. So either the first fight was an outlier or Geed is purposely lowering his power to give Z a chance to grow. Which is possible as we see with Zero in UGF2 that he would lower his power to match that of Taiga's to show Z some stuff.
But yeah I guess Beta Smash scaling to Galaxy Rising should be okay I guess but Alpha Edge maybe not. Cause like Windom who is comparable to Alpha Edge Z couldn't really do anything against a weakened Gilvallis. So from the looks of it Alpha Edge scaling is probably out the window. And during the fight with Gilvallis, Alpha Edge Z had to use the Z Lance Arrow to keep up with it while Beta Smash Z didn't need to use it. So I personally think that only Beta Smash should scale to Galaxy Rising Geed. So anyways going over some stuff
Base Z will probably scale to the likes of Base Taiga since despite being inferior he should still be somewhat comparable to an extent. So he should still scale to the 2,250x baseline 3-A.
Alpha Edge Z is kind of in an unknown area. It is leagues stronger than Base Z and I honestly feel like it should scale to the other New Generation Ultras Base form which scales to Photon Earth Taiga but we don't really have proof of that. So for now it can only be massively stronger than Base Z rather than 4,500x baseline 3-A.
Beta Smash Z is the one that potentially scales to Galaxy Rising Geed so he would possibly scale to 10,800x baseline 3-A.
Gamma Future Z scales above King Joe which is 5x Windom who is comparable to Alpha Edge. But since we have no proof of Alpha Edge scaling to Photon Earth Taiga it would just be 5x Base Z so just 11,250x baseline 3-A. Which is kinda weird as it should be leagues stronger than Beta Smash. If Alpha Edge does have proof of scaling to Photon Earth Taiga though 5x 4,500 would've made Gamma Future 22,500x baseline 3-A.
Delta Rise Claw Z scales to the Reiwa Era Ultra Brothers so it would scale to 270,000x baseline 3-A just like the other New Generation Ultras in their strongest form.
But yeah overall Z's scaling is still kind of a mess as he doesn't really scale to anyone in particular. Let's just hope Ultraman Trigger and UGF3 will shed some light on where Z scales.