Linear and honest: 3-bet the top, call with hands that dominate nothing but flop well.
The reference tier. 3-bets are linear and value-heavy, live-style; calls are pairs, strong suited hands, and the best broadways.
The tightest confrontation at the table: an early open, and you right behind it with six players still to act.
Assumes a ~4bb open; 3-bet to ~3x the open in position, ~4x from the blinds — larger as stacks deepen.