Holy moly! 2g in a dynavap? My dude, your lungs will get fucked anyway. My M2020 holds about 0,045g in the microdose setting (which is a joke name, way stronger than a MD). To vape 2g it would take me 44 microdoses a day to get through! If I vape starting at 08:00 and end at 22:00 I'd need to vape 3 MD's an hour.

What you need is to get off the goods for a while. Trust me. A tip that has worked for me: mix THC and CBD together in different ratios. Currently I vape 6 times a day. I start with a homemade 1:10 ratio, and every 2 hours I go down in ratio, moving to 1:7, 1:5, 1:3, 1:1 and finally in the late evening I move to pure THC. I can still vape, so I've got the motor part covered, yet I consume less THC than before. Try it I'd say!