I've been noticing a lot of streamers use hybrid pen on most champs regardless of trinity, like ahri or fizz simply due to the fact hat early auto's/etc gain so much from them.
For now I think I am going to stick with my 4, and just continue picking up champs, until I have everyone I want, then focus on more and more specific rune pages.
EDIT:
http://www.lolking.net/summoner/na/20242980#runes
That is what I'm currently working with, ifyou can think of maybe just one more good all purpose page I might consider adding into my rotation.