[Deck] U/G Infect

[Jesture]

I found the following sideboard tech at the first page last year.
Is this the way we should board? Instead of boarding out stifle, what would you board out?

Side boarding is difficult because Infect tends to be a pretty tight list with variability on maybe 5-6 cards at most between any given list. The only cards I would never side out are Invigorate, Berserk, and Brainstorm. Everything else can leave the deck in some matchup or another.

-The distinction between the play and the draw with this deck is pretty huge. Daze, Stifle, and Wasteland all become significantly worse on the draw, you'd only leave all three of these in post board against hard combo decks.
-Our Infect Threats all do different things. Think about what removal you're up against and consider boarding out based on whatever answers they bring in.
-Delve cards are strong, but they definitely come out against quicker matchups. The exception is if you're siding in another Crop Rotation, or if you're already playing 2 in the main.
-Force of Wills come out against fair decks.
-Invigorates always stay in. They're by and far the best pump spell in the deck, and go a long way to enabling the one shot kill.
-Berserks also stay in. Don't be afraid to use them on unflipped Delvers or low power Goyfs, your opponents can't win if they can't pressure your life total.
-Vines of Vastwood can come out against faster decks or decks without targetted removal.
-Stifle gets significantly worse if your opponent is playing around it. If your opponent sees it, it's almost always right to side it out in the following games (exception is against something like ANT).
-Crop Rotation has a lot of flexibility, but is a blowout if it doesn't resolve. Consider taking this out against counter-heavy decks.
-Gitaxian Probe isn't always useful. Think about the life versus the information when deciding to keep this in (Do you really need to know what spells Burn has in hand?)

Here's a couple of sideboard plans. For reference, my 75:

12 Creatures
4x Noble Hierarch
4x Glistener Elf
4x Blighted Agent

29 Non-Creature Spells
4x Invigorate
4x Vines of Vastwood
2x Berserk
1x Become Immense
1x Dig Through Time
1x Crop Rotation
1x Stifle
4x Brainstorm
4x Daze
2x Spell Pierce
2x Force of Will
3x Gitaxian Probe

19 Lands
8x Green Fetchland
4x Tropical Island
1x Forest

4x Inkmoth Nexus
1x Wasteland
1x Pendelhaven

Sideboard
2x Force of Will
2x Submerge
1x Piracy Charm
1x Divert
2x Krosan Grip
1x Nature's Claim
1x Sylvan Library
1x Crop Rotation
1x Bojuka Bog
1x Karakas
1x Pithing Needle
1x Spellskite

VS RUG:
On the Draw

Should come in
+2 Submerge
+1 Piracy Charm

Situationally comes in
+1 Divert (Ranges from a narrow Spell Pierce to a 2 for 1 on a removal spell and a threat)
+1 Spellskite (Are they bringing in Artifact Removal? Spellskite is huge food for Goyf, think hard before bringing it in)
+2 Krosan Grip (Blood Moon or Pithing Needles?)
+1 Bojuka Bog (Slows down both Goose and Goyf)
+1 Pithing Needle (Did you see a Lavamancer?)

Cards to side out
-2 FoW
-1 Crop Rotation (Bad against Wasteland deck with counter magic)
-1 Dig Through Time (Gets much worse in the face of Pyroblast and lack of Crop Rotation)
-1 Glistener Elf (Good luck connecting with those)
-4 Daze

VS BUG Delver:
On the draw

Should come in
+2 Submerge
+1 Divert
+1 Sylvan Library

Situationally comes in
+1 Spellskite (Makes Goyf bigger, but it's better against Disfigure than Bolt)
+1 Piracy Charm (For Dark Confidant)

Cards to side out
-2 FoW
-4 Daze (Especially bad against Deathrite Shaman)

VS Miracles:
On the draw

Should come in
+2 Krosan Grip
+1 Sylvan Library
+1 Pithing Needle
+1 Piracy Charm (Peacekeeper feels bad. Also gets to hit Snapcaster and Clique. Also the dream of Piracy Charm in response to Miracle trigger with one card in hand.)
+2 Force of Will (Miracles has a couple of high impact cards we need to stop, but the rest of the deck is pretty easy to deal with. As such, the card disadvantage from Force of Will hurts us less in this matchup.)

Situationally comes in
+1 Submerge (Peacekeeper feels bad. Do what you have to do to keep it off the field.)

Cards to side out
-1 Crop Rotation
-3 Daze (Personal preference, I like this configuration because Daze has the upside of occasionally getting around CounterTop, while Spell Pierce almost never will. Also, very few people expect the Daze, and a singleton is easy enough to shuffle away with Brainstorm.)
-1 Spell Pierce
-1 Wasteland

Situationally comes out
-1 Blighted Agent (If you know they're playing Pyroblast effects, one of these guys can come out of the deck. The unblockable isn't as relevant in this matchup.

Sideboard strategies On the Play are just abbreviated versions of sideboard strategies On the Draw.
I may write up some more side boarding plans in the future, but this is exhausting and it's always going to be situational. There's no substitute for experience, so just play as many games as you can with the deck and test out what works best for you.