This is a more simple and refined version of Cyka, and is my go-to all day vape about 80% of the time. These flavor percentages are not arbitrary, wild-assed guesses. I have tried so many little tweaks and changes to it, but it's perfect with equal parts of all three. The only change I sometimes do is to up the Butter Cream to 5.5% enhance the thick, full, almost savory mouth feel. Butter Cream ABSOLUTELY makes this recipe. Any less than equal to it's counterparts, and it just doesn't quite do it. A little more doesn't hurt though, depending on your preference.
For me, this is unquestionably a shake and vape. I prefer it fresh over steeped. It's still good with a 1-3 week steep, but it doesn't quite have the "bite" that lets it be such a good standalone when fresh. After steeping, it would make a great cream/custard base at a lower %, but even though these are all flavors that typically take time to reach their peak, this is not one of those recipes. I only make it in 30ml batches, just so it's always fresh. Shake the hell out of it, let all the bubbles rise out, fill your tank/drip it, and hit it like a redhead stepchild.
I am sure that you could play with the VG/PG ratio, even max VG, and it would be fine. It just works best with my setup at 60/40.