vs Darkness
Our Blessed Otyugh deck would be a brilliant matchup here. Half of the cards darkness has can't stand up to the might of a 3/6 Otyugh. Likely our biggest issue here is if the go Aether. They can then fractal Devo's which would eventually become harmful (I can't see them doing that vs Oty's though...) or Quinted Dragons. Altogether that seems like their safest option.
You forgot about drain life- otys can't eat anymore.
vs Entropy
This is a little bit harder to judge. I think we should settle this one later. Discord is a big problem. Perhaps an Immolation + Phoenix deck could come in handy here.
Immo-phoenix-fire eater, I think. Just be careful of BE.
vs Aether
Our Discord/BH decks are always an option against Aether Lightning is a big problem. We might get away with our Earth Duo
My first thoughts are earth duo or neuro deck.
vs Death
The safest deck here would probably be our water duo. The freezes allow us to stall things if they don't go with a poison deck.
Sounds good to me. Another alternative would be discord/BH, but I'm not sure how effective it would be.
vs Fire
I don't really know what to do here. It seems like the Earth Duo has the greatest chance of success. Our only answer to Fire Stall is Earthquake, but now that fire is aware of this, they will probably rush us again. In this case we need to have a lot of Creature Control Based on these points, the Earth Duo has the best chance of success, it can defeat a stall quite handily, and it can utilize Plate Armor to stop a rush deck cold.
Our worst-case scenario would be a rush with potions... an aether deck, maybe? I'm not sure.
vs Light
A time duo could be useful here. Lights best offense against us in all honesty is Blessed Pegasus. The 5 damage stays away from our unbuffed Otyughs and is just under the Gravity Shield that stops everything else they have. They could also run the Phoenix deck, which would spell certain trouble for us.
Blessed pegs, blessed dunes, or miracle-deckout. Sundial/RT, with chargers and otys, in my opinion.
vs Time
Not sure what to say about this. The Dune Scorpion decks seem popular.
Dunes with blessings, their death/time duo, perhaps a wings deck, a graboid deck, dim stall with eternity, or a fire deck (fire storm/deflags/rage potion). All in all, very versatile, a water deck would be a good choice here too, as would our own fire deck. Not sure what to chose.
vs Water
Just not AdrenMercs. We've learned our lesson on that one.
Lots of choices here. We'll want to take a deck that uses cards that only run off the mark, in case they still have that mindgate deck. Not sure what to deck to put here either- either fire or discord/BH, maybe a neuro deck.