I think I have a different issue with PG, some sort of over sensitivity in the throat.
When I first got my Odyssey, I really struggled, despite being used to the harshest of analogues, I couldn't take a draw from it with pre mixed with out really coughing and spluttering. I gave up for a while until recently when the analogues really had to go. After reading some advice here, I got a T Ice mixing kit, VG type, with AG dilutent. The only PG in the mix was the flavour at 20%. This works really well for me. I can take a nice draw with a little throat hit, but no coughing.
My problem is maybe different than yours, just putting the info out there.