There's definitely more strategies you can play as you gain cards, also a fact I didn't know about until I was already in like Chapter 11, as you beat/gain the summons for each outdoor zone, you can go back to that card shop guy in Grasslands and buy their card to add to your deck. Not all are that great, but some other options.
Later challenges also get pretty wonky with specified powers and trying to really build certain decks that take advantage of buffing or enfeebling (some of the most powerful decks revolve around you enfeebling/destroying your own weaker cards to buff certain cards that gain in power for every one lowered/destroyed). But basically the 3 main strategies you can do are buffing cards, enfeebling (the opponent or your own with certain cards that benefit), or building a deck that has a lot of options for taking over their pawn spots and basically suffocating them out of having any real spots to play on the board, while you just keep adding more spaces for yourself. I find the last strategy gets you through a lot of the game without needing to change much, barring a few attempts on certain guys needed if you get bad starting cards, etc.
Later on once you get cards that specifically can replace your own (and so do your opponents), meta changes again that you need more balance and power, can't always just suffocate them out of spaces.
