Fight the Power!
The 2016 bannings of Summer Bloom and Splinter Twin have effectively killed those decks. The Modern meta is already shifting to 4 decks - Infect, Tron, Affinity, and the new-ish Eldrazi Control. Certain decks are inherently strong against those decks, like Merfolk (Fish). Another example is Bogles. It (and of course, it's sideboard) is good against those 4 decks.
So don't let those 4 decks dominate! Come on and make a Bogles deck and help Fight the Power! Fight the Powers that Be!
Bogles is an aggro deck and a very easy deck to play. Plop down a Slippery Bogle or Gladecover Scout and start enchanting the heck out of it. You will have to mull aggressively, at least on game 1.
Tip1 - If you cast a Kor Spiritdancer, be sure to have mana open to cast an enchantment immediately afterward - even if the Spiritdancer is killed, you still get to draw a card because you still cast the enchantment (it just won't resolve since there is no longer a legal target).
Tip2 - Liliana of the Veil is your biggest threat (aside from turn 1 losing your Bogle to Thoughseize/Inquisition of Kozilek). Be sure to keep a fetchland open, so when she does her -2 (Sacrifice a Creature), you can use the fetchland to get Dryad Arbor and sacrifice that. Game 2 be sure to board in Leyline of Sanctity.
Tip3 - The 8 Umbra cards provide Totem Armor, so be sure to put one on ASAP if you suspect a board-wipe.
Now that Splinter Twin is no longer a thing, the new Oath of the Gatewatch Natural State is hands-down better than Nature's Claim. That 4 life IS important.
Stony Silence mainly hits Tron and Affinity decks.
Suppression Field hits those decks and a slew of other cards - ALL Planeswalkers, ALL Manlands, AEther Vials, Cursecatcher, Scavenging Ooze, Knight of the Reliquary, popular sideboard cards (Relic of Progenitus, Tectonic Edge, Ghost Quarter, all Artifact Equipment, Engineered Explosives, etc.), and it also hits Fetchlands - but be careful! It will hit YOUR fetchlands as well, but by that time, if you have 2 mana, you shouldn't worry about drawing a fetchland since your whole deck has a CMC of 2 mana, save for 2 Unflinching Courage.
Rest in Peace is there for graveyard hate, especially on Living End decks, which gets around hexproof and can wreck your day.
Pithing Needle is really only there for Ugin, the Spirit Dragon. Even though Bogles is strong against Tron decks, sometimes Ugin actually makes it out and board wipes (Umbras save your Bogles, but he will now be completely naked).