Master-level One Piece Card Game strategy
Strong players manage DON!!, Life and Counter values better than their opponent.
DON!! efficiency
Every DON!! you spend should do the most work. Plan curves so you use all of it each turn, and decide when giving DON!! to attackers beats playing another Character.
Life is a resource
Taking a hit gives you a card and maybe a Trigger. Against slow decks you can let early attacks through; against aggressive ones, protect your Life early.
Counter values
Count the Counter cards in your hand and your opponent's possible Counters before attacking. Spread attacks so they can't block everything profitably.
Board and Blockers
Keep your board at a size you can protect, and use Blockers to force awkward attacks. Remember the 5-Character limit.
Leader matchups
Each Leader changes the game plan. Learn the top Leaders' key turns and plan your answer in the Vault Strategy tab.