I'd drop him.
I actually like Hellickson but I like him a lot more in H2H than in Roto, he'll be .500 pitcher with not a lot of K's (although this year he has had a couple nice games). Don't know if you have an innings cap but if you do then I like dropping him even more, he'll be eating innings with a minimal reward for a 10 team league.
I would just stream SP's by matchup (as you've said) or pick up Arenciba (or Gregg if you want a pitcher off that list)
Not the question you asked but I would also look at dropping Hardy for Rutledge
12-team 5x5 H2H w/4 keepers