Suggestion might not make sense, its always a coin flip.
Anyhow, the scenario…
Make a bunch of building block presets of single shot rhythmic units.
1/4 1/8 1/16 1/32 1/64 and so forth…
Load presets into Instrument and start combining single shot rhythmic units into phrases.
This method is already possible,
except you have to use the pattern editor for the single shot rhythmic unit.
The Phrases method seems like it would be expansive, organized, and less
bloated than the Pattern Editor method of saving a template of, for example,
35 patterns of single shot combinable rhythmic units.