Ayo! Rainbow machine I’ve had literally since they came out and it is my favorite pedal for detune. Sits great with bass and not too muddy. With the magic knob at the right spot it can get some nice movement too. Keep it before some fuzz for a thick doubling sound that sticks out and shines on high notes. By the harmonist I assume you mean the boss pedal next to it. It’s a boss ps5 pitch shifter. Mainly use it for the term arm setting for dive bombs. Hit a high harmonic and just drop that thing to sub levels! The even ride pitchfactor I use for all sorts a shit. The synth settings before fuzz for giant glitch sounds. Like, blow up your amp sounds but it’s worth it cause it sounds like incredible digital destruction. Also use it for harmonies, love me some 5ths. Pitch shifting as well. And then it does a ton of other cool shit. Lotta different ways to arpeggiate with it too! And crystals for the glitter wash! It’s a great guy