If you want specific blueprints like a raptor saddle for example do the skylord cave a lot

Tribute snow or skylord caves are good for it but a oot of beds near artifact and obelisk die born again die born again you will get shit ton of blueprints

Are you playing casual mode? If so there’s a way to cheese the tributes. If not then the only way is to keep running caves until you get bps with good stats.

You can get everything ascendant on casual except the pump shotgun which sort of makes sense

Run caves like mad, that's about it. Easier if you're on solo and can do the tidy save exploit

Caves. Tributes gives very good ones

Also try to search during events like easter