From LSWiki

Justicars are trained in the martial discipline known as Tsar Quen. Tsar Quen is a unique combat style that allows the Justicars to make use of the shields granted to them by Axa to perform a variety of devastating attacks. These include special combo abilities that are especially effective when performed in the proper sequence.

Tsar Quen requires a practitioner who is skilled in both concentration and martial arts, and they also frequently rely on brawling, although other requirements are possible for individual maneuvers.

Tsar Quen Maneuvers

Mercurial Impact

   Usage: perform mercurial impact [at <target>]
   Activity Cost For You: 12

   A quick but relatively weak attack that slaps your opponent with your shield.

Ratings seem to be mostly based on Strength, Agility, Martial Arts, and Shield. Specifically, attack Rating is something like

• 130% Strength
• 124% Agility
• 24% Willpower
• 24% Intellect
• 24% Perception
• 120% Martial Arts
• 26% Brawling
• 110% Shield
• 25% Concentration
• 25% Combat Reflexes
• 25% Tactics
• 25% Killer Instinct

Damage is approximately

• 130% Strength
• 96% Agility
• 24% Willpower
• 95% Martial Arts
• 26% Brawling
• 24% Concentration

Essence Smash

   Usage: perform essence smash [at <target>]
   Activity Cost For You: 21

   Charge your shield with esoteric energies and attack an enemy.  The type of energies your shield is charged with will depend on the affinities you possess.

Knowledge requirement: ~180 Concentration

Attack Rating is

• 129% Agility
• 100% Strength
• 125% Perception
• 45% Willpower
• 25% Intellect
• 100% Shield
• 125% Martial Arts
• 45% Concentration
• 25% Combat Reflexes
• 25% Precision Strike
• 25% Tactics
• 25% Killer Instinct

Damage bonus comes from

• 100% Strength
• 100% Agility
• 100% Perception
• 45% Willpower
• 100% Martial Arts
• 45% Concentration
• 100% Killer Instinct
• 100% Massive Blow