I hope this helps anyone growing an indoor Musa AeAe in the future. Updates will come weekly/biweekly if there are no significant changes.
Mini update today #1.
The splitting stem is slightly longer, I'm sure the exterior leaves are prepared to die soon due to lack of sunlight. Before, they were stored in an IKEA DIY Greenhouse. I have ~10 anthuriums in there and they were all doing well. I assumed the Musa would be, but it clearly faltered. IKEA humidity maintained 70-80%, temp highest was 71F.
DIY Greenhouse #2. Moved all light-demanding plants to a mini closet on 6/7. The lamp is Mars Hydro 600W. The Mylar will be delivered today, updated pictures will be edited into this post. Humidity has dropped to 46% in this closet, temp risen to 86F. NOTE: The Mars Hydro is an exposed LED panel, I'm not sure how to introduce humidity without risk of shock/shortage. Still figuring this one out.
It looks dim in the photo, buts its very bright and more light than any window in my apartment (NW facing).