My DAW has a very sophisticated routing and buss system. How to deal with routing and Sonimus consoles?

Sonimus console grouping has no relationship with routing. The grouping function doesn’t route audio, it merely only links and controls the individual Console instances.

Grouping for Satson and Britson works as a remote control. From the Master instance, it is possible to control all the individual instances of each track. So there is no audio routing involved, just remote control over the multiple instances of the plugin.