80M testing using 7 element Yagi (13dBi) @80' Beaming NE de K8UR/4

Tx/Rx Daily beaming NE from Raleigh, NC using 7 element Yagi @80' and 400W between 2100z-2230z.
I am looking to see when 80M opens to Eu and trying to get a sense of how many dB of attenuation occurs before band opens.
I was hoping that WSPR may be able to look down into the noise further than SSB or CW, but am disappointed so far. A good CW ear can hear into the noise as good as WSPR seems to be able to hear into the noise and all the big guns aren't on WSPR, which limits how far down the attenuation actually goes before 2100z.
Does the attenuation before 2100z (D-Layer?) reach -10dB or -100dB? WSPR doesn't know. We need some bigger power and ant gain to find out on both sides of the link.
If anyone has a big signal in Eu and want to see how far down this rabbit hole goes, I'm on the air 2100z-2230z daily with about 8kw ERP @ 30deg above the horizon, pointed 65deg True from Raleigh, NC.