Hmm interesting idea, I rarely take cull on ANY champ.
I honestly believe that in lvl 1, the combat stats provided by dorans is much more valuable than the potential investment in cull.
Think about it - cull gives you 350 gold (or something? Idk never build it) but first blood gives you that much instantly.
So personally, for my playstyle, I take offesnive items/runes etc and try to first blood the oponent at lvl 1. This is a much better investment than cull.
Also Cull doesnt provide much combat stats and you're stuck in a passive playstyle. I hate it and I would rather buy dorans any day on any champ in any situation. (I hate farming / last hitting/ playing passively. I think that playstyle is very boring. I like to brawl and fight, thats how I enjoy league the most).
Just my 2 cents cheers.