It's just lack of access to the encounter deck @ 1 per turn.
I totally agree,
even with Denethor + Unexpected Courage got me through 2~3 encounter deck cards per turn,
I was still having trouble getting those Athelas cards out before Wilydor got seriously injured.
God forbid if there are no Athelas/Forest Groove in top 10~15 cards of encounter deck, or no Lore of Imladris cards in top 10~15 cards of player deck.