I agree with @rsmith601 on the order for those 2. I have my board of madness that has an Aftershock, C4 Synth, UWB and Spectrum bracketed by other pedals so I can do some crazy ordering of effects, I have a Neuro Hub to recall various scenes. The C4 does have a good selection of distortion sounds that would likely cover most scenarios, I put that to some good use in my jazz gig.Curious how, which one first?, everyone who has a C4 and an Ultrawave Bass are on their boards?
I have some time today so I'll be putting my new to me UWB on my board. I was thinking UWB 1st but then my octave would be after and I'm hesitant to do that since I've always preferred the Oct, fuzz, filter order but. I may just use the UWB as a stand alone and continue using the C4's distortion for my OFF use.
UWB is gonna, for now, replace the Collider on my board. I haven't really been able to use it as much as I anticipated I would. I'd keep it on my board but with my EQ2>C4>UWB(currently Collider)>Atlas> SB Finally with a Hub and Soleman setup I have limited power available. The Finally is on it's own power supply. I might research power supplies but for now I'm gonna keep it simple (at least as simple as a SA board can be! Lol!)
So I'll be experimenting today. Should be fun.
The UWB is such a powerful tool box that mine is often pulled off the board to use it for production duties for the excellent compressor, EQ and gates used as a channel strip of sorts. That might not interest you since you have the EQ2 and Atlas already.