I am relatively new to Onyx. I do know that there is a somewhat of a random/sawtooth path that can be set between cues.
Without having to create a separate window that allows direct control of the path in which cues take an easier option to create random effects would be to create a random playback of cues within a cuelist.
Setting the path to sawtooth/random between each cue but then with the addition of the entire cue stack playback to be set to random would be useful.