The Sunday Question: Confederate Strategy in the East

Should the Confederacy have remained on the strategic defensive and foregone invasions across the Potomac, limiting itself to countering enemy moves, or should it have followed the more aggressive approach of Robert E. Lee?  Should it have followed the advice of James Longstreet and used operational maneuver to force the Army of the Potomac to launch attacks at places of Lee’s choosing?  In short, how should the Confederacy have waged war in the East?