Downvotes on this sub work in misterious ways

I would try sugar cookie at 8% and cap vanilla custard at 4%, that is Dave’s recipe. Sugar cookie does fade, and is not the strongest flavor to begin with, so 8% as a solo cookie flavor is good. This is a great simple flavorful recipe. Then you can build on it, or leave it as is. If you like the flavor acetyl pyrazine gives, you can add a little Jungle Flavors cookie, maybe 2%, a little depth to the custard, Vape Train pudding base, also low, 2%. You can add a little Capella frosted sugar cookie that would add a little fluffy to the cookie aspect, but it’s also a weaker flavor so play with the % to see what you enjoy. For me,this is the recipe that helped me the most. It gave me something pretty tasty as is, and really good to build on, sometimes I’ll add a jam or a lemon. I have found the less I depend on cap sugar cookie, the better for long run flavor. When I start messing with the recipe, I’ll drop sugar cookie to 4-6 %

And a more direct answer to your question, cap sugar cookie does not get more intense with a steep. And while our equipment has come a long way, there are still some flavors that are not as strong, so you’ll still need to increase them.