I keep a Freqout inside the back of the rack, set and forget, activate loop 4 when I want the feedback effect, only “must have” for me; but I do enjoy messing around with various fuzz boxes, which often do some unique sounds, breakup, bloom, decay etc
find the Axe does most typical OD pedals really well, likewise, modulation and delay, does most any pedal with a little tweaking.