My brother gets a Grape Pie juice made at his local vape shop and whenever he visits he lets me try it. I can't get a good clone going. Here's some recipes that I've tried so far :

Here was my first attempt :

• 5% Pie Crust (TPA)
• 3% Meringue (TPA)
• 4% Grape Juice (TPA)
• .5% EM
• .5% Brown Sugar (TPA)
• 1% Whipped Cream (TPA)
• 1% Graham Cracker (TPA)
  This version tasted pretty good after it's initial mixing as a shake and vape, but turned into utter garbage after steeping. I have a feeling it was the Meringue at 3% that caused this as well as the ethyl maltol.

Second attempt :

• (FA) Meringue 1.75%
• Apple Pie (FA) 1%
• Blueberry Graham Waffle (FW) 2%
• Cream Cheese Icing (LA) 0.5%
• Grape (FW) 5%
• Marshmallow (FA) 0.5%
• Pie Crust (FW) 3.25%
• Pie Crust (TPA) 1%

I lost this bottle rather early on. However, it did help me realize that I much prefer FW Grape to TPA Grape Juice for this recipe. I decided I was making the recipe a bit too complicated at this point and I should work with the bare essentials, and build up from there.

And this was my third attempt as a result of that thinking :

• Cheesecake (Graham Crust) (TPA) 3.7%
• Grape (FW) 6.5%
• Pie Crust (FW) 2%
• Pie Crust (TPA) 2%

This version is the best tasting one I have made so far, and has retained its good flavor after steeping, unlike the first version. I was hoping I could get some help in improving the recipe to better match what I'm looking to create. Tasting the flavor right now, after about a week of steeping, seems to have a little bit too much pie crust and over time has lost the sweetness and potency that the grape flavor had after trying it with no steep. I'd like to retain that grape flavor over time so I'm thinking of dropping the TPA Pie Crust to about 0.75% and Cheesecake to 3%.
What do you guys think about including FA Apple Pie in this recipe. I was also thinking about using CAP NY Cheesecake and/or FA Meringue and/or CAP Vanilla Bean Ice Cream to give the flavor a "fluffier" profile. I'm looking to make more of a succulent, moist tasting pie flavor rather than one dominated by the crusty tones, but I still want them to be apparent(maybe a good use for AP?). Please help me make the idea I have for this juice a reality. Thanks!

EDIT :
After reading some of your guys' suggestions, I've made a few modifications and here's the new recipe :

Ingredient|% :---|---: Fuji Apple (FA)|0.25 Grape (FW)|4 Grape Juice (TPA)|2 Marshmallow (FA)|0.5 Meringue (FA)|0.5 New York Cheesecake (CAP)|2 Pie Crust (TPA)|1.5

Flavor total: 10.75%

The 0.25% Fuji Apple is definitely helping the Grape flavors in this recipe stand out a little more and adds a little bit of sweetness. I think the combination of Marshmallow and Meringue have gotten me closer to the creaminess of the original Grape Pie flavor that my brother had. I decided to get rid of Cheesecake Graham Crust and FW Pie Crust and stick to just TPA Pie Crust. I also added CAP NY Cheesecake. I don't have much experience with NY Cheesecake but I think it has added a good amount of richness to this recipe and made it more "savory" like I was looking for. I'm really happy with this recipe so far as a shake and vape, and it's definitely improved--hopefully it tastes good after steeping as well.
I'm considering trying some Vienna Cream in this recipe, but I have very little experience with it as a flavor because I just purchased it a week ago. It definitely smells like it has the "sweet milk" flavor that I think would work well with this recipe at a low percentage.