Fair enough. I was just looking for a general direction as I have never tried to achieve this sound before.Sorry if this sounds too obvious, but just try a few pedals and see what you like. You already own one the greatest amplifiers ever made, so literally any pedal will sound good. What sounds best to your ear for the tones you like is not something I think we can really help with
Thanks! I will check these out.A muff type is easier to handle since it's fuzzy but almost distortion like (compared to a fuzz face or superfuzz). If you're going for EHX ones the Op Amp and the Green Russian are both cool for fast-ish sludge.
For clones or modded muffs from other manuacturers check out Black Arts LSTR or Paraoh. EQD Hizumitas (Boris sig pedal) sounds cool too but I haven't tried one yet.