In Automapping, is there any way to use a fixed output layer with layers with probability?

I don’t know whether there’s a way to create multiple output layer with or without probability in automapping

for example, I want to do some conversion which always create something, and other things by probability.

Currently I’m using separate automap rule file one for fixed conversion, one for probability conversion.

But if I can do it without separate rule file but with a different layer name, it would be a lot convenient.

I hope layer without index on its name always produces that output,
and layer with index produces output by probability.

Currently if I use layers with / without index together, it works like layers without index has some default index and affected by probability.