The only really important thing, when mixing, is be very careful to get the nic level you want. I, and many, mix down fro 100mg/ml stock. Watch your calculations (several good, easy and free apps for mixing), you don't want to end up with a juice that's, say, 30 mg/ml when you wanted 3!
A suggestion. When you get a new flavoring (other than things like sweeteners, smoothers and such), try a small batch of it solo. Knowing what each individual ingredient tastes like, to you, will let you make more intelligent choices on what to adjust when they're used in a blend.
That said, one of my favorites I always have ready:
Honey Dragon Tea - all TFA
Black honey tobacco
DragonFruit
Green Tea
Your choice on nic % and PG/VG ratio. (I vape at 18%, roughly, and roughly 65% PG. Lazy mixer here, I keep a working stock, that only needs flavors, that is just a bit higher than my desired nic level, and just lower than my desired PG level - most flavors come in PG, so adding them lowers the nic and raised the PG%)
Start with all at 5%. While it does improve with some steeping, it's fine right after mixing.