Alexa has a feature that allows you to define your own routines that execute a command using your own trigger. I have been experimenting with it with JTalk and it looks very promising.
For example, I have implemented
J River Pause Ask J Talk to Pause
J River Play Ask J Talk to Continue
J River Playing Now Ask J Talk to Display Playing Now
J River Collins Ask J Talk to Play Artist Judy Collins on Zone Player
I am finding these routines very nice for some routine commands, although you cannot customize them on the fly for specific artists, etc. You need the full JTalk implementation for that. And you have to be sure that Alexa sees your routines as unique. For example, Alexa plays using the default music server rather than using J Talk for the routine trigger J River Judy Collins. But these routines may be useful for some common tasks, including common playlists or commonly used Play Doctor commands.
Routines can also be used to do a set of tasks at a given time, like bedtime, and even when you get home or leave using geo-fencing.