IMO you can stop with the compression tests and starting looking other places for your oil burning. Maybe valve seals are gone?!
I know that on older engines you could take the head breather out and see if there was smoke coming out, if there was your valve seals were probably gone.
Also you could check pcv, if your pcv isnīt working correctly you might be having too much oil vapour in your sump and that creates a lot of strain and pressure on the piston rings and they can let some oil go through.

What do you guys think about that?