Thanks for posting this. I've been interested in how to translate this chord into different tuning since I first started experimenting with tuning.
To my ears, the literal spelling of E7#9 sounds really off in 19-edo, with the #9 sounding irritatingly flat. E7x9 (or E7addm10) sounds much more Hendrix-y to my ears, but, it's not like there is an accepted interpretation by music scholars. Playing around with the chord in JI systems, I noticed also that the dom7aug9 spelling yields a weird vibe that doesn't strike me well.