In any case, I congratulate you on being one of the few, like me, who was able to maximize your growth potential. But don't go to that level of e2, bro. Take care of your libido, your sleep, your bones and joints, your overall recovery and mental health.
The average gain in adolescents suffering from idiopathic short stature is 2-3 inches over a couple of years with AI and HGH at fairly high doses (0.1 IU/kg and higher). Moreover, idiopathic short stature is more complex than just an unidentified cause; low IGF-1 may even be to blame. For example, someone's IGF-1 level was 300, still normal but low for a teenager. He raised it to 600 and began growing faster.
The fact that you have a BA of 16.5 at 19 years old just means that it's mostly genetics, because in studies of 2.5 mg of letrozole (and for most people this dosage makes less than 8pg) the height was still less than your current theoretical height.