My take on Abzan Aggro.
The goal is to surprise them after sideboard with flying creatures while humming this
Reap What Is Sown
/Abzan Ascendancy and optionally Abzan Charm all give my creatures +1/+1 counters and then Abzan Falconer acts less like a creature and more like an enchantment that gives all my creatures with +1/+1 counters flying.
High Sentinels of Arashin
works in a similar way but instead of giving everyone else flying, it has it itself and gets buffed by all my other creatures with the tokens. He usually ends up being 6/7 when he attacks, but can get even bigger, making him better in this build than Wingmate Roc
Sorin, Solemn Visitor helps me stay in the game longer with lifelink and by being a lightning rod, with the bonus of an extra creature if necessary or a a win-con if they can't deal with him.
Warden of the First Tree is new so I'm giving him a shot
The sideboard has an extra Anafenza, the Foremost specifically to deal with reanimator decks.
EDIT: Updated description.
After some play testing, I have decided my deck will likely be more effective with Operation: Rhino Drop as the sideboard, and 'typical junk aggro' as the mainboard.
This is how I will be playing the deck tonight at FNM. I will, in most cases, sideboard in Operation: Rhino Drop game 2, but I might wait until game 3. I will try and get it in at least once in each match. However, running it as the sideboard gives me that option, whereas running it main board forces me to run the combo every single match game 1.
Will update with results.