Ooh that is way too high on flavorings for me

I usually don't go over 20% on my flavors and I find the taste is better below 20%.
Single flavors I will do even less, starting at 5% and then going up or down as needed.
For this recipe I would start with...
Watermelon 8%
Green Apple 5%
pineapple 3%
Ethyl Maltol 1%
This is 17% and if after a good steeping you think it needs more of a certain flavor, you can adjust the percentages up or down as needed. You may even want to reduce the pineapple a little more as sometimes it can get a little skunky. Best pineapple I have tried so far is Capellas Golden Pineapple
I don't know why but when I look at this recipe I keep thinking that TFA Apple candy would be good in place of the green apple... a little more jolly rancher maybe