with shadow tag, how about
calm mind, acid armor, rest, hidden power.
switch in on something that cant hurt u and power up.
u need hidden power b/c all it only knows fire, ghost, ,grass, and poision type moves, which can be nulled when facing one with an immunity. darn u herbivore.
the challenge is in getting a hidden power type that hit all regardless of type and ability(dark,bug,ice,rock,steel). Oh, there's shedinja. ehh..that narrows it to dark and rock. a hard set to get but killer once obtained.