Yeah I got a really large jug of Nic and I have it sealed in freezer. The place I got it from had excellent long term storage instructions on their site or linked to my order or something. Anyway I have lots of Nic, as you advised and I treat it as a precious commodity. The way I am mixing I'll use it quite slowly.
For my primary flavor I went with Cornell & Diehl Virginian. Its different than Huntsman but has some of the grassy notes I enjoy. I also sprinkle a touch of Vanilla in there, too, which I am pretty sure you suggested. I tried the without vanilla and with vanilla versions and the vanilla definitely helps smooth the overall
vape flavor out.