It'll be a little easier to see our options when a little more work is done, but here are my (other) initial thoughts:
Hyroen vs

Amilir and brettbstock vs

Nyma
For the reasons I outline above I'm currently liking sudden killer for Hyroen and some sort of Wings stall for brett. If the Wings stall is creature based it'll need ragepots to deal with potential BE. Sudden killer doesn't need a nova or reflector.
jmdt vs

home_wreckaz and majofa vs

Corrum
As entropy was kind enough to point out, bonewall is a real problem card. And corrum knows it. I don't want to use poisonbolt because we used it in our only Death matchup to date. Team Death has shown a lot of different deck designs and will continue to vary their designs, so going through previous decks will be less useful for Death than maybe any other element. Fractix is a good counter to bonewalls, though it's a bit transparent. Still, we don't have many options if we want to field nine, so fractix it is. For major I was thinking of testing the earth duo. With maybe our hammer, golems, fspirits, and EQs, we might outpaced their shields.
kevkev60614 vs

Daxx and catalyzeme vs

hrmmm
We're pretty limited in our deck options, so it looks like I'm taking fractix. I like immop for cat simply cuz I don't like it against death or aether. Freeze and BB are suboptimal. When I have time I'll look at how immop and our other options measure up to their four decks, which we should know almost card for card.
Acsabi44 vs

Boingo
We've used it before but poisonbolt seems to be a better fit here than anywhere else.
Lava Golem vs

Rastafla
Last round I considered Dragon Powa but dismissed it because I was concerned about miracle stall. They lost one miracle stall, lost all their RoFs (I suspect) in their suicide, and might be hesitant to play miracle stall against us. They might be out of EQs as well. I'd like to see how Dragon Powa competes with their immophoenix because I consider it to be relatively likely and I like Dragon Powa against their other decks.
Stinnger vs

9270984
That leaves novagrabby, which should fare well unless they take the time to build a counter. Kael has been complaining a lot about having to suicide though so I don't think they have that kind of flexibility.