Since you probably have a filter already, I’d say:
COMP → SPAT (on thru)
DELAY → CHO/PHA (on neighbor)
A good compressor is key to leveling resonant peaks and cavities, lending more overall punch and presence. The OT compressor is perhaps more in the league of “decent” than good, but does the job, with plenty of colouring/grit when pushed.
As another tangent, you can simulate multiple sub-, detuned or harmonic oscillators by sampling and re-playing the thru machine output on additional (flex) tracks. No end to the fun you can have with that.
Here are a few tips on how to set it up: