That is an interesting idea! Currently mimLive doesn’t support triggering other layers natively (there is only a “start the show” action).
However, you could try to use the JSON Importer patch (comes with mimoLive) to trigger the HTTP-API of mimoLive itself. The API gives you access to all kind of data in mimoLive and is able to switch on/off or toggle layers.
Here is the API documentation with a brief description on how to build a request URL:
Building an API URL
The JSON Importer patch will output a QuartzComposer struct that you can easily examine with the “Struct” patches.
Does this help?