Some partial progress notes after playing Nexus (Simic + Bant) for a few more days:
- I didn't run into any white aggro, which should be the matchup the sweepers are best at. Still, I blew out one monored player with Cleansing Nova (he was running Guttersnipe; otherwise I'm skeptical of bringing in sweepers in that matchup). Was kind of a funny game. At 15 life on turn 3, he played Risk Factor, and I let him draw. A few turns later, he played another Risk Factor, and I still let him draw. I was thinking at that point that Nexus will win the late-game, so the main constraint on him would be the mana he has available, not the number of cards he had ... but then he made all his land drops till the game ended.
- I won the match, but I'm skeptical monored is a good matchup for Nexus. I won game 1 because I comboed faster than him, and then took game 3 off the Cleansing Nova blowout (he had greedily played two Guttersnipes before playing his burn). Like white aggro, monored is fast and very consistent. The weakness is, if they have a burn heavy hand, they will easily lose. A creature heavy hand however is very threatening.
- I played and lost to monoblue once. I won game 1 because he drew no counterspells. Game 2, I drew 3 Kraul Harpooners and 2 Carnage Tyrants and still lost. The Harpooners held the air, but his Djinn were big enough to block Tyrant and Herald was able to attack through anyway. Eventually I ran out of life before I was able to chain together turns. Game 3 I lost as well after he had T2 Curious Obsession on Herald. There's no way to beat that, sadly. This opponent also kept in Dive Down against me, which come to think of it might make sense (not least because it wins creature combat). The upside is, even if Kraul Harpooner is "countered" by Dive Down, it's still around to block.
- It doesn't seem like Carnage Tyrant is good against monoblue. It will likely need four attacks to win, and that's a lot.
- Crushing Canopy is probably good vs. blue. I didn't board it in, which must have been a bad idea. Hydroid Krasis maindeck helps in this matchup as well.
- The manabase
can take the strain of an additional color. Occasionally it will hurt, e.g. one might not want to pay 2 life to Opt on turn 1, but the damage isn't too heavy. The real question is whether the additional color is worth it, because right now, I have so few white cards in the deck.
- Conceivably I could just take out Root Snare and put in Settle the Wreckage.
- Murmuring Mystic is a card to try, since in theory it can provide a steady stream of chump blockers and is big enough to block everything even if boosted. If this works out then white isn't necessary.
These past few days, it seems I've finally found a deck to play for the rest of the season