(\.sfv|\.par\"|[^ ]\.nfo|\.cue)
I use this as an indication as to what is being posted. If I want a post, then I just add a filter for that subject line.
For series posts, I've been using
odyssey5.*1([-ex])?03 # for odyssey ep 103, still missing that
odyssey5.*1([-ex])?1[5-9] # 115-119
odyssey5.*1([-ex])?2[0-9] # 120-129
odyssey5.*2([-ex])?[012][0-9] # next year's eps, in case i forget to set a filter

The filter covers 123, 1-23, 1e23, 1x23, and the less frequent s1e23 formats. The first format sometimes pulls in extra stuff, but not too much. didn't want to miss those b5 eps.
--Joe.