We run alot of 1mm, 1mm, 2mm ring packs in our higher dollar high horse power application in hundreds of engines every year. (Not cheap by any means).
I still run old school 1/16, 1/16, 3/16 rings in my street / Strip 528 HEMI with a Moroso Enhanced Design 4 Vane vac pump with no issues with mine for several years now.

1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.