I've used those ingredients for making my everyday vape.
Yield: 45ml @ ~16mg/ml
07.50 ml: 100mg/ml Nic in PG
02.00 ml: TPA TA blend in PG
01.00 ml: Seedman's commercial
00.50 ml: Whatever
tobacco sampler liquid I grab out of a hat (waste not what not)
30.00 ml: Glycerine
04.00 ml: 100 proof vodka
The last TPA TA batch I got has much more absolute in it than the last. This recipe has been tweaked to handle it. Originally I had used 50% more (3ml) of it.
In the end, you want to end up with a final product that doesn't leave a ring around the bottle. The flavor is very light as compared to most commercial products. To me those are all too much.
YMMV