I found that it’s not very convenient to use an external fuzz. There are two options - use it in front of the QC, or through a FX loop.
In the first case, this makes it impossible to use the noise gate before the fuze.
In the second case, you need to change the impedance at the input to a suitable one for the fuzz. But then you won’t be able to switch from fuzz to something else, because again it’s necessary to change the impedance and the impedance settings are global.