Just because I'm being a nerd about this:
Chemtrails
Jack Antonoff – mixing (except 8)
Laura Sisk – mixing (except 8)
Kieron Menzies – engineering (8), mixing (8)
Dean Reid – engineering (8), mixing (8)
Trevor Yasuda – engineering (8)
John Fee – engineering (8)
John Rooney – engineering assistance (except 8)
Jon Sher – engineering assistance (except 8)
Chris Gehringer – mastering
Blue Banisters
Adam Ayan – mastering engineer (1–10, 12–15)
MIke Dean – mastering engineer, mixer (11)
Dean Reid – mixer (1, 3–8, 10, 15), engineer (1, 4–8, 10, 15)
Gabe Simon – mixer (2), engineer (1, 2)
Drew Erickson – mixer (3, 6–8, 15)
Michael Harris – mixer (3–8, 15), engineer (4–8, 15)
Cian Riordan – mixer (5)
Jason Wormer – mixer (9)
Lana Del Rey – mixer (12–14), recording arranger (4)
Barrie-James O'Neill – mixer (12–14)
No wonder people felt the mixing on Blue Banisters was a mess. There are 8 credited mixers across the album, some on the same tracks.
Chemtrails had the same mixers (Jack and Laura) except for Yosemite.
I hope the credits for Ocean Blvd will be more streamlined mixing-wise. It's obvious Drew isn't super great at mixing yet (I know there were a lot of complaints with Arcadia + Beautiful initially), which makes sense since his main role is composer/producer.