Pip Slope + O/A/x2 combo looks pretty awesome, but IMO function generators are best in pairs. Patching one into another to make all sorts of wild modulations.
Maybe consider 2x Pip before getting the mix/atten
or After Later QARV is cheaper than (2x) Pip and has more capabilities
https://www.modulargrid.net/e/after-later-audio-qarv
Tip Top - Miso has 4 channels and is the same price as O/A/x2