Stay close to 50.
Wins - helps the churn, neutral for aces, and hurts RP
QS - helps the churn, neutral for aces and kills RP
K's - helps the churn, neutral for aces and hurts RP
BB's - kills the churn and helps RP and aces
L's - kills the churn, helps the RP and helps aces
ERA -kills the churn, helps RP, helps aces
WHIP - kills the churn, helps RP, helps aces
SVs - helps RP a ton, hurts the other 2
You have 3 stats that help churn and 4 that hurt them and one where they don't get stats
You have 4 stats that help aces, 3 that are pretty neutral and 1 that they don't do anything for
You have 5 stats that help good RP and 3 that hurt them.
I would try to get some good SP and would load up on decent closers and elite RP. This setup really hurts churns unless you are really really good at it. But churning with this setup is just spinning your wheels, you are likely hurting yourself as much as helping.
To put this in perspective, if you could somehow use 50 IP of RP and your opponent used 200 IP of crappy starters (to use a silly example). You would win BB, L, ERA, WHIP, SV almost every week, he would only win K, QS and W.