Been trying to break Birthright. A mix of overcosted threats and chaining extra turns is a pretty good way to do so.
Land a birthright, try to use messenger Hawk to copy sol's rest, and the market Zal Chi if you can. Decimate the first sol's rest when you think you've caught your opponent with their pants down, then use the bonus birthright cards and a big threat to try close the game before their turn rolls around again.