This is the updated version a midrange-control Boros deck that has done very well for me the past 2 cycles now. The New Capenna upgrades are few but impactful. The deck performs very consistently and you get to have some pretty amazing turns too! The linked video is prior to The Streets of New Capenna release, but an updated vid is coming soon, and the older vid does a good job with the mechanics. 

Sideboard I use is: 2x environmental sciences, 2x reduce to memory, 1x mascot exhibition, 1x academic probation, and 1x introduction to prophecy. I would say the last spot is flexible, but the others are near necessary. You will be learning a lot of lessons, but sometimes a discard and draw instead is a good play.