Seems like you're cooking up a solid bot detection solution. I'd recommend adding JA3/JA4+ into the mix, I had good results against dumb scrapers.
Also, have you considered Captchas for first contact/rate-limit?
If you have smart scrapers, then good luck. I recall that bot farms use pre-paid SIM cards for their data connections so that their traffic comes from a good residential ASN. They also have a lot of IPs and overall well-made headless browsers with JS support. Then it's a battle of JS quirks where the official implementation differs from headless one.
Also, have you considered Captchas for first contact/rate-limit?
If you have smart scrapers, then good luck. I recall that bot farms use pre-paid SIM cards for their data connections so that their traffic comes from a good residential ASN. They also have a lot of IPs and overall well-made headless browsers with JS support. Then it's a battle of JS quirks where the official implementation differs from headless one.