Proper installation of 2 Smart Water Valves off 1 water bib, and what are recommended components to install with it, and in what order? Looking for the ideal configuration and component recommendations

I’m preparing to install a drip irrigation system, to cover a small 4ft x 12ft vegetable garden on one branch, 3 new small ornamental bushes on another branch, operating off 1 Smart Timer, and the other Smart Timer will only be watering a newly planted 2” dia tree. What would be the optimal configuration of components to install along with the timer valves. Looking for recommendations for Backflow preventers, filters, pressure reducers, etc. Also looking for order of installation recommendations. I’ve been reading up on the topic, but just interested in what others have done , and are using.

Thanks
RDel