VPN > Tor: Good To know. Thank you for sharing.
As to the rest: Most appear to be under Server Side control. For the choice of IPs, I think I can filter Tors list of usable IPs... I think. Is there a list of known problem Ips? Or perhaps such an effort would not pay good dividends?
If you anonymously buy a non-free VPN subscription and connect to it from Tor, you should see reduced captchas. Running VPN > Tor is also good to hide the fact that you are using Tor.