BUG: they're gonna try to fight on the stack which slows them down.  Most likely boarding out removals too so we just gum up the board with tokens and have some Negates to push through reclamation.
-2 Fog
-2 Sabotage
+2 Negate
+2 Murmuring

RB Mid: Birds aren't as good b/c of Chainwhirler.  Ooze-wall still works.
-1 Fog
-1 Murmuring
+2 Ooze

Mono Blue: block things and grind them out of cards. If they don't Curiosity on Mist-Cloaked, we should be ok.  They'll likely side out Dive Down so Blink should work more. 
-1 Fog
-1 Negate
-2 Sabotage
-1 Perception
-2 Nexus
-2 Reclamation
+2 Harpooner
+2 Archer
+2 Murmuring
+3 Canopy

Wx Aggro: we just want to block things until we get set up.  If they're Blue, watch out for DSphere guy. 
-1 Negate
-2 Sabotage
-1 Perception
-1 Nexus
-1 Reclamation
+2 Archer
+2 Murmuring
+2 Ooze

Drakes: they have limited counterspells so play around Spell Pierce when possible and slow down their clock.  They might bring in Niv.
-3 Fog
-1 Negate
-2 Sabotage
-1 Perception
+3 Canopy
+2 Harpooner
+2 Murmuring

Esper: they're going to bring in Thieves.  Protect Azcanta and use Blink on Teferi when they have to cast him.  Use Nexus timing to catch them off-guard (end of their turn, when they tap out to Insight end of our turn, etc.)
plan A: fight on stack.
-4 Fog
-1 Blink
-1 Nexus
-1 Murmuring
+3 Negate
+3 Canopy
+1 Frilled

plan B: creature beatdown.  Better on G2 to catch them off-guard.
-4 Fog
-4 Nexus
-4 Reclamation
+3 Negate
+3 Canopy
+3 Murmuring
+1 Frilled
+2 Ooze

Mono Red: value them out with all of the blockers.  Fog is fine for 4-5 damage if you think of it as a gain life spell. 
-4 Nexus
-2 Azcanta
-3 Reclamation
+2 Archer
+2 Murmuring
+2 Ooze
+3 Negate

Mirror: set up a turn to Nexus end of their turn and go off.  Azcanta is more important to fight over than Reclamation.
-4 Fog
-2 Blink
-1 Murmuring
+3 Negate
+3 Canopy
+1 Frilled

Gates: You don't really care if they draw a bunch of cards.  Protect Reclamation and Azcanta while tempoing them out with Blink on creatures.  If they're Nexus also, bring in Canopies.
-3 Fog (-4 if Nexus)
(-2 Blink if Nexus)
-1 Murmuring
+3 Negate
(+3 Canopy if Nexus)
+1 Frilled