Sounds like a solid plan for the lawn. As for the buried drip line – hmmmmm. That doesn’t sound easy to figure out! I highly recommend removing the drip line from Flex Daily and putting it under a Fixed schedule with the duration you had set on the Rainbird. And yes, the precipitation rate would be set under Nozzle Inches Per Hour.
That said, here’s a post where I explain how I figure out my drip line nozzle in/hr (can work for shrubs if you don’t have trees in your drip area):
