I've put on my thinking cap for my match versus Death, and I think I've come up with a reasonable analysis as to what we should do for the next round.
First off, Death must discard 30 cards from these 2 decks:
Spoiler for Hidden:
Hover over cards for details, click for permalink
4sk 52g 52g 52g 52g 52g 52h 52h 542 542 542 542 542 542 542 542 542 61t 61t 61t 61t 61t 61t 622 622 622 63a 63a 713 713 713 8pu
Hover over cards for details, click for permalink
4vn 4vn 4vn 4vn 4vn 4vp 4vp 4vp 4vp 4vp 52g 52g 52g 52g 52h 52h 52h 52r 52r 52r 52r 52r 52r 542 542 542 542 542 542 542 542 542 542 542 71a 71a 8pj
Poof, a strong Fractal duo is gone.
With the discards in place they're now down to 108 cards which include the following decks:
Spoiler for Hidden:
Hover over cards for details, click for permalink
4sk 4sk 4sk 52g 52g 52g 52h 52h 52h 52t 52t 52t 52t 52t 52t 542 542 542 542 5up 5up 5up 5up 5v1 5v1 710 72i 72i 72i 7t8 7tb 8pt
Hover over cards for details, click for permalink
52g 52g 52g 52g 52g 52g 52h 52h 52h 52o 52o 52q 52q 52t 52t 542 542 542 542 542 710 713 713 713 71b 71b 71b 71b 71b 72i 8pk
Combined salvages, discards etc. comes to 61 cards from decks that weren't discarded, 7 cards from decks that were discarded, and 12 cards from salvages. So we have a strong idea of what 80 out of 108 of their cards will be. So 28 of their cards have the ability to be a complete surprise, though I'd be more than willing to bet that they're cards used to splash into Death for random strong duos versus certain opponents (Wings, Discord, Lightning, etc.).
Now when first looking at the situation from our perspective it seems obvious that Death would try to use their Darkness duo against us. Steals take care of Dim Shields, Nightmare mitigates Fractals, and Dusk Mantle just acts as a general pain in the ass. But wait a second, Death doesn't know for certain that we still have 4 Dims left in our vault, do they? I'm sure it seems obvious that we would keep a few in reserve, but there's still a chance they might overlook this. Let's also take a look at the rest of their match ups.
Death faces Earth and Aether this round. Earth is down to what remains of the Immortal and some other miscellaneous cards and more importantly an Aether duo with Fractals and Dims. Aether has god knows what remaining in their vaults, but lost their Sanctuary stall last round. Aether's RoL/Hope probably also has the ability to counter most of Death's decks.
Based on these facts I'm actually not so sure we can expect to see their Darkness duo from them next round. Depending on what remains in our vault we could still potentially outrush them even with Nightmare clogging up our hands in addition to Lightnings blasting anything they can throw at us. Furthermore they don't know if we have Dims or not, whereas Earth and Aether definitely do. Earth's Fractal deck seems much slower than Frogtal, which makes it a prime candidate for Death to use their Darkness duo against. I don't think Death would send that duo against Aether, but they might try it if it manages to slow down RoL/Hope enough.
So if Death doesn't send that deck against us, what would they use? Something fast or something that completely walls off our Frogs/slows them down is what I would expect. Death has the ability to salvage 4 Dims from Darkness and I'd be very surprised if they didn't have a few Lightnings hidden in their vault somewhere. Given that we didn't use any Silences last round or Dim Shields it seems like anything with Dims would give us trouble. And then there's also Wings, though I'm not sure if they still have that or not. Discord might also still be in their vault, and they could salvage Pandemoniums in an attempt to mow down our Frog army, but Silence takes care of that as well.
So to avoid rambling even further: I think we should use Silences and Dims in place of Lightnings and Lobos for this round given that I think it's unlikely for something with ridiculous amounts of PC to be used here. It's a bit of a gamble either way, but prediction always is. I'd love to hear other thoughts on this situation though.
Salvages/Discards:
Well discarding for this round will be very difficult...
For salvaging I suggest we take 4 Bone Walls and 2 Mummies or 4 Mummies and 2 Bone Walls. If we manage to defeat Death then that gives us the possibility of fielding a full-fledged Death duo, but we obviously can't make good use of 8 Bone walls or 8 Mummies which is why I'm not decided on which to take; it all depends on what we'll expect them to use.
Support battles:
I still need to think about this more, but food for thought: we got hard countered considerably last round mainly for the reason that people anticipated rushes and built the appropriate decks to counter. Now, if people expect the same again then what do you think will happen if we use stallbreakers or actual stalls against them instead?
Also, I have no idea who our support team duels are against since apparently the support team battle thread wasn't updated to show this.