vs
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Upgrading titanium shields to diamond shields stops pufferfish, so the earth duo may still be quite viable vs water. In any case, I am not sure we can salvage enough fire cards to make a fire duo without discarding other critical cards (mummies, arsenic, bone walls, poison).
vs

Re: the fire matchup, we could still salvage purifies and put a grabbow there. Due to the event card, we can build a 36 card grabbow and drop 6 death cards, so we only need 12 death cards in the version that we actually play in the match.
Note: we can salvage a total of 4 purifies, and either spread them across the water and fire matchups or put them all in one or the other.