One thing about fuzz pedals - they are super picky about what you feed them. I had to build a pedal with a small transformer to 'unload' the kemper profiling output from the fuzz. Worked great, here's my results
Both clips are an Eric Johnson signature fuzz face feeding a '74 Marshall 50 watt head that is stock.
https://soundcloud.com/okstrat/ej-fuzz-rough
This one is a lot gainier and grittier - I was going for splatter and just general fuzz mayhem.
https://soundcloud.com/okstrat/ej-fuzz-smoother
This one is obviously smoother, more of a sweeter lead tone. Both need some tweakage but I'm pretty happy with how they came out. i wasn't sure if the Kemper would capture the interaction between the fuzz and the amp, but it did in spades.