That’s to bad to hear about the massive drop in frames that happened with the shadows, but luckly you were able to find a nice little work around that still gets the idea across.
How is the performance of the glowing sword working for the dark areas of the map that you travel in? How are you handling that since you can use the dynamic shadows if I am thinking of this right? I am not to well versed in mobile development but I know that what you can get away with is severely constrained since its on a smaller device.
Kyle D.