Architecture help for multivariate input and output LSTM models
Basically every answer I was looking for was exampled and explained in this tutorial. Absolutely great resource for trying to understand how to model multi-output networks. This one goes through a lengthy walkthrough of a multi-output CNN architecture using Keras functional API. It only took me about three weeks to stumble upon, however.

https://www.pyimagesearch.com/2018/06/04/keras-multiple-outputs-and-multiple-losses/