Thought experiment: Just how high can you pump Rosie Cotton's attack power?
Rules:
1. Assume you are using one deck, which means no more than 3 heroes and no more than 3 copies of each card. The deck can be as large as you'd like, though.
2. No saga or encounter cards may be used, though player encounter cards are fine. Exception: you're free to assume there is one Eastern Crow in staging, one engaged with you, and one engaged with another player just to give you your choice of targets.
3. Assume that you've been playing the quest for arbitrarily long and have set everything up exactly to your liking. This means any number of cards in hand, any number of cards in play, any number of cards in your deck (in any order-- assume you just dropped a Gandalf's Search), any number of resources, any threat level, etc.
4. No using cards whose bonuses are potentially unlimited. This means no Keeping Count, no Lay of Nimrodel or Gondorian Fire, etc.
5. No Grave Cairn, just because.
6. No recurring any cards from your discard pile, because otherwise this becomes a game of "pick your favorite infinite loop". I'll make an exception for 3x Lords of the Eldar, because that's the only way to play it.
I've got an answer that I think is fairly optimized, but I'll hold off a couple days before posting it in case anyone else wants to give it a shot first.
Edit: @sappidus reminds me that Grave Cairn only counts printed attack, so it's back on the table. I mostly just didn't want to turn this into a dwarf-counting exercise.
Edit #2: a much simpler way of stating rule #6 is that no card can be played more than 3 times except for Courage Awakened / Noiseless Movement / etc, which can be played four times. (Because otherwise you just infinitely loop your attack buff of choice.)
Edited by Some Sort