Regarding origin, this is basically the Duboudreau Cocktail from Meehan's Bartender Manual (p 341) with Rum instead of Rittenhouse Rye.
I thought this was very nice. Zippy and fresh with some floral complexity. I'll try the original with equal parts next.
I tend to prefer the equal parts
Crop Top should be in this list in my opinion
A touch less lime juice
Blackberry Pineapple Rum Cocktail
Dark/black rum, Grand Marnier, Blackberry syrup, Lime juice, Pineapple juice
Is there a suitable substitute for rose water?
I tried St. Germain which worked.
Tara The Great
Vodka, Coffee liqueur, Whipping cream, Egg white (pasteurised), Salted caramel syrup