If you have a recipe to go by just follow the recipe j adjust it to your taste.
Eggs ackly. (Darn, I think Gareee's contiguous)
I see any recipe as a starting point. I'll make a small(ish) batch initially, and give it a fair test. (For me, that's either 10 or 30 mls, letting me vape a tank as a shake and vape, and then again after steeping.) Then if I want, I'll make adjustments for the next batch.
And, unless a flavor is specifically for blending (not particularly interested in, say, strait graham cracker crust...