I bought an Istomp in the great $39 sell off. I do not currently use it live but am thinking of setting it up as a single effect and using it and never attaching the pigtail to it again and messing with the app. I currently use a zoom b3 and or mb 60 for any effects. What 1 single effect should I set my iStomp to for usefulness? I play rock covers, if this helps.