My end goal is to use AVS to trigger a skill on another (real) Echo.
Let's say I have two "devices"
1) Device A (a registered device on AVS)
2) Device B (a real Echo)
I can hit AVS (Device A) with a call like "Alexa, please play jazz on Device B", and Device B will play jazz.
However, I can't trigger skills on another device. For example, I want to call Device A with the invocation "Alexa, please play Amazon Storytime on Device B", and have Amazon Storytime play on Device B.