Fast Leveling in Dwarven Rampart
Since duplicated cards are confirmed to convert into efficiency and health boosts for buildings or survivor-style upgrades for dwarves, don't treat duplicates as wasted draws -- they're confirmed as a genuine, intentional progression system.
Since the game explicitly frames defense as "keep what you can defend," avoid overextending your city faster than your army can actually protect it.
See the full data: Dwarven Rampart Getting Started