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First Rates are the kings of the seas. No ship can compare to their sheer firepower and ability to take punishment. The poor maneuverability makes First Rates extremely vulnerable and they should never be sailed without an escort.
Having extremely poor acceleration and turning statistics, the 'Invincible' First rate is best used in a line battle. The only truly useable tactic for a ship of this size is simply sailing parallel to it's opponent and slugging it out.
However, in a larger group of ships, much more creative strategies arise. If faster ships of a friendly battle group can heard an enemy ship under the guns of this ship, the results will almost surely be catastrophic for said enemy, even more so if the 'Invincible' is capable of getting in a raking broadside.