Breathing Pattern for 50 fly LCM?

I did my first 50 fly LCM in ages last weekend. It was the first time that I did since I was maybe 12. Obviously, I swam in SCM for Summer League up to 18. Anyway, I did a :34 last weekend but can obviously drop time once I get the proper breathing pattern situated. Should I come up for every stroke on the 50 or breathe every third stroke.