Well, if I recall correctly, Rina did wrote "The Reflex" which is one E/A Centric episode...
but I don't know if she's the one who wrote the E/A scenes.
She also co wrote "The last of Summer" with Berlanti and "Home" with Michael Green which were amazing episodes.
Finally, she wrote "For every action" all by herself. There were nice E/A scenes in this one.
I am confident that this episode will be excellently written. And the description indicates Amy rethinks her feelings for Ephram which means, at least, a little storyline devoted to them. If I remember correctly, there was also a description saying Amy realizes Ephram has always been there for her while they remember something from their past. I hope it's in this episode !!!! I can't wait !