Below is the deck I'll be taking to OKC. I've read a lot of the articles lately and noted down Dylan's suggestions on sideboarding. Those were focused on Tier 1 decks, but there were some other matchups that I had thoughts on. I get stuck where I see cards I want to bring in, but struggle to identify what I should take out. Open to suggestions. Between these and Donegan's, I think that covers the majority of the meta.
4 Death's Shadow
2 Gurmag Angler
4 Snapcaster Mage
4 Street Wraith
2 Tasigur, the Golden Fang
Lands (18)
1 Island
1 Swamp
2 Blood Crypt
4 Bloodstained Mire
4 Polluted Delta
3 Flooded Strand
1 Steam Vents
2 Watery Grave
1 Dismember
4 Fatal Push
1 Kolaghan's Command
4 Opt
2 Stubborn Denial
1 Temur Battle Rage
1 Terminate
4 Thought Scour
2 Inquisition of Kozilek
2 Serum Visions
4 Thoughtseize
1 Engineered Explosives
2 Young Pyromancer
2 Ceremonious Rejection
1 Kolaghan's Command
2 Kozilek's Return
2 Stubborn Denial
1 Temur Battle Rage
1 Liliana of the Veil
1 Liliana, the Last Hope
1 Collective Brutality
1 Izzet Staticaster
Burn
-4 Street Wraith
-4 Thoughtseize
+EE
+2 Stubborn
+2 K-Return
+1 Collective Brutality
+1 Temur Battle Rage
+1 Last Hope?
Scapeshift
-1 Thoughtseize
-1 IoK
-2 Street Wraith
+2 Stubborn Denial
+1 Collective Brutality
+1 LOTV
+1 EE (? - unsure what else to take out, maybe another Wraith)
Affinity
-4 Thoughtseize
-2 Stubborn Denial (worth keeping in? Key card is Plating, but figure sideboard cards are better at it)
-1 Street Wraith
+1 EE
+2 K Return
+1 K Command
+2 Ceremonious
+1 Staticaster
+1 Last Hope
Counters Company
-1 Dismember
-1 K-Command
-2 Thoughtseize
-1 Unsure of what else
+1 EE
+2 K-Return
+1 Last Hope
+1 Staticaster
+1 Brutality