In those lists, I would agree with the consensus and never run 41 cards outside a small subset of archetypes (WW or something like that)
In Terastal Festival, Leafeon doesn't currently make the top 10 most expensive list
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And this doesnt mean necessarily winning through damage, but rather playing so many spells that it becomes a consistent threat thanks to it giving prowess to your other creatures, while also being able to use both your and your opponents spells from the graveyard
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You can add in more madness and discard effects to turn up the early pressure even more, or add white recursion particularly Abiding Grace and play the value game with Squirrel Sanctuary and Legion Vanguard, finishing with chip from Vermin Gorger and Sanctuary Raptor or an overwhelming army of tokens pumped by Drey Keeper