I was in the same boat. Stuck in the trial and error rut for quite some time. I recently learned of this forum and discovered the primevapes selection and I'm so thankfull for the discovery. In fact, it's what made me join the forum. Lot's of helpfull people here. Whilst the stocks are running low for the primevapes juices, I have been purchasing a juice called 'Athena' from darkstar. It's a strawberry, kiwi and bublegum mix and I'm addicted to the stuff.
I bought the Athena bottle shot bundle at 3mg. Total cost was £15.95 and you end up with 250ml of eliquid for that price.
On a side note, It would be amazing if primevapes wen't down a similar route, using bottle shots. Wonder if it's been considered?