FYI, #show has less functionality than #showtooltip, so it's not always appropriate to use it just for the smaller character count.
In any case, mine had fewer already. If the character count really matters, it's not necessary to explicitly state which modifiers or forms (same meaning as stance but shorter) you want to check for if you've already exhausted the alternatives. Although I guess I could have done with with mod instead of nomod:
Code:
#showtooltip
/cast [mod:shift,form:1]rend;[mod:shift]piercing howl;[form:3]pummel;thunder clap