Like Ingolf said, we also have a Freqout, for us in front of the Kemper. It is magnificent.
We also have a Mimiq in the (stereo) external effect loop that used to get more use, it is still there though.
I have the Freqout in the loop for Elec stuff, and swap it for a Mimiq (in stereo loop) for acoustic accompaniment with a singer. Still hoping these effects will be KPA inbuilt one day, but tbh I'm not holding my breath.
Nothing in front typically. I'm a fuzz pedal addict/dork, but find the inbuilt fuzz's are fine for live things. Recording though, I always use a real fuzz pedal as the subtleties become more obvious.