Now I am confused. I was just wondering about the cheesecake base minus the fruit or other flavoring.
Then just follow the recipe from whatever eliquid calculator you're using...to mix the PG, VG, nic, and the cheesecake base flavorings together and put it aside to steep. Pull off whatever amount you want to at a time, after it's steeped...and add your 1 fruit or other main flavoring to it. I think I got that right anyway.
If it were me though, I'd just mix the flavorings for the base itself...and let them steep. It would be like making a cheesecake one-shot. Follow a recipe then, for whatever size batch you want to make...using some of the cheesecake one-shot, my single additional flavoring, nic, PG, and VG...to get my final nic mg and PG/VG ratio exactly what I wanted it to be. But, that's just how I do it with other one-shots I make ahead and use to make various sized batches.