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In the new version, the peasant has been removed, which means that the strategy of using a "Viva" spell + peasant vs. Firebird may no longer be viable. I haven't tried it myself, but the peasant was very helpful in that battle.
It would be great if the strategy of using a duck vs. Mother Nature was mandatory, as it's a much more interesting battle than using a Titan, in my opinion.
The strategy involving fakes seems plausible because we don't lose anything (we fight with 0 mana), and we still need to figure out how to remove the boots before taking Pandora.