I've vaped Tribeca almost everyday for the last 2 months and my own DIY RY4-D over the last 3 weeks. I've made several iterations of the RY4-D, including playing around with different % of AP in it. At this point, I'm not quite convinced that RY4-D + AP is close to Tribeca.
AP is a key ingredient in Tribeca. Its scent and taste, especially on a newly opened bottle of Tribeca, is unmistakable. So when you add AP to a mix of RY4-D, it will smell almost exactly the same as Tribeca, but it vapes far from it.
The Tobacco taste in Tribeca (well steeped, at least 2 full weeks after bottle opening and decanted) is bold, solid and very dominant. A good dose of sweetness accompanies that bold tobacco taste. While the RY4-D is very sweet, it just doesn't have that solid tobacco punch that Tribeca has. In fact, RY4-D as a Tobacco vape is on the (very) mild end of the spectrum. It's the wide margin between Tribeca's tobacco taste vs RY4-D that is the primary reason why I doubt whether RY4-D is the correct direction in attempting to make a clone.
Tribeca is Halo's "take on the RY4." What characterizes nearly any RY4 is the presence of caramel and vanilla to complement an otherwise solid tobacco flavor. Although I may be wrong, I do not detect Vanilla in Tribeca as much as I do detect chocolate or cocoa, which comes along in this juice at the end of a drag. To me, Tribeca is (a Bold Tobacco) + (a sweet Caramel) + (a dry, bitter Cocoa) + AP.