Two ways to increase this as well that the damage calc doesn't allow, would work best in a triple battle:
1. Paras uses mimic to copy reflect type and uses that on a scizor/escavalier/forretress, then trevenant uses forest's curse on paras, natural 8x weakness to fire, further expanded by dry skin.
2. Extra helping hand since they stack in triples, so x2.25.
