I only apply reverb to the guitar tone before it enters the looper. It's the same with overdrive, etc.
The drums in the looper emerge dry. So the only way to reverb them is to place a reverb unit after the looper.
Even with the looper in the loop of my amps, the amp reverb is after the FX Return so I don't use it.
I'm not fond of the one-dimensional control you get with onboard amp reverb anyway.
My 4CM pedalboard chain (LS-2
A) is: Guitar>OD20>Spark>Preamp>Zoom MultiStomp (reverb, etc.)>RC-3>Power amp(s)
My direct pedalboard chain (LS-2
B) is: Guitar>MT-2>NS-2>Zoom MultiStomp>RC-3>Power amp(s)
I know you are not a fan of added effects
@eSGEe, so all this may be a wrench (or hammer) to your psyche!

But I can't see another way of using reverb and keeping the JOYO dry.
I've had a look for the Hartke amp you recommended but my LGS has never had one in 2nd hand, so I'm not hopeful.
The KickBack is the newer version?
The Fender Rumble 15 or 25 looks like the sort of amp that would do me fine in just a bedroom setup.
I plan to add modelling and effects with a Zoom MultiStomp bass gizmo so don't need any super EQ or onboard FX.
Has anyone tried one of these (not the Studio versions)?
They do come up on Gumtree 2nd hand and I might even be able to afford new.
If I swap out the NS-2 on my pedalboard for an MS-60B then the LS-2 (
B) signal chain for bass would go:
Bass>MT-2(OFF)>MS-60B (comp, OD, modelling, EQ)>MS-70CDR (TBEs)>RC-3>Bass amp IN