Shield Skill

Category:Combat Skills
Shield Skill determines your ability to block an Attack with your Shield, negating some or all Damage. The higher your Shield Skill, the more often you will block attacks with your shield (varying with enemy's level relative to your job level). 
===Shield Block Activation and Effects===
To activate Shield skill you must:
*Have a shield equipped.
*Fail your evasion and parry checks.
*Be facing the mob (under ~60 degree angle). 
Additional facts about blocking with shield:
*Shields can block physical TP moves. A successful block with Ochain also prevents any additional effects from landing (e.g., Bukhis's Lethal Triclip won't dispel Cruor enhancements, Frypan won't stun, etc.)
*Shields can block counters. A blocked counter functions the same as a missed or parried counter. The counter doesn't go off, and the log only shows your original melee hit. Since a blocked counter does not actually hit you, or deal damage, you do not receive TP for them via Shield Mastery.
===Shield Block Rate===
Shield block rate is similar to Summoning magic skill in that the player receives a bonus to block % based on the amount of Shield Skill they have ABOVE their level's natural shield skill. 
Block rate is also penalized by mob level, though you do not receive a bonus for being above the Mob's level. 
The estimated formula for Shield Block rate is:
Shield Block Rate = Base_Block_Rate + [((Shield Skill – Base_Skill)/SkillDivider) – LevelCorrectionFactor]
'''
Base_Block_Rate = Depends on shield type, ~50% for Type 3 (proposed, though it could be lower, as I'm oversimplifying the skill divider).
Skill_Divider = 1~6 (depending on skill level tiers, potentially a stepwise increase every 100skill or so).
LevelCorrectionFactor = (MobLevel-PlayerLevel)/2, and only applies to mobs above our level, similar to pdif level correction.
Damage_Absorption = BASE + Shield_Defense / 2 
[http://www.ffxiah.com/forum/topic/21671/paladin-faq-info-and-trade-studies/
Research and Confirmation of Shield Block %s.]
===Job Ratings===
Job 	Skill Ranking	Cap at Level 1	Cap at Level 47	Cap at Level 95
Paladin 	 	6 	144 	396
Warrior 	 	5 	133 	350
White Mage 	 	4 	128 	310
Beastmaster	 	4 	119 	280
Red Mage 	 	4 	109 	249
Thief 	 	4 	109 	249
==Equipment that Enhance this Skill==
===By Amount Added===
Name 	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase	Skill Increase
Name 	+15 	+12 	+11 	+10 	+7 	+6 	+5 	+3 	 	
Fighter's Mufflers +1	 	 	 	 	 	 	 	 	 	
Gallant Leggings +1 	 	 	 	 	 	 	 	 	 	
Acheron Shield +1 	 	 	 	 	 	 	 	 	 	
Warlock's Boots +1 	 	 	 	 	 	 	 	 	 	
Warlock's Boots 	 	 	 	 	 	 	 	 	 	
Rogue's Culottes 	 	 	 	 	 	 	 	 	 	
Master Shield 	 	 	 	 	 	 	 	 	 	
Gallant Leggings 	 	 	 	 	 	 	 	 	 	
Fighter's Mufflers 	 	 	 	 	 	 	 	 	 	
Boxer's Mantle 	 	 	 	 	 	 	 	 	 	
Acheron Shield 	 	 	 	 	 	 	 	 	 	
Shield Torque 	 	 	 	 	 	 	 	 	 	
Creed Armet +2 	 	 	 	 	 	 	 	 	 	
Kaiser Schaller 	 	 	 	 	 	 	 	 	 	
Skeld Sword 	 	 	 	 	 	 	 	 	 	
Storm Shield 	 	 	 	 	 	 	 	 	 	
Sinfender 	 	 	 	 	 	 	 	 	 	
Shield Belt 	 	 	 	 	 	 	 	 	 	
Pilferer's Aspis 	 	 	 	 	 	 	 	 	 	
Light Buckler 	 	 	 	 	 	 	 	 	 	
Koenig Schaller 	 	 	 	 	 	 	 	 	 	
Knight's Earring 	 	 	 	 	 	 	 	 	 	
Creed Armet +1 	 	 	 	 	 	 	 	 	 	
Mu Necklace 	 	 	 	 	 	 	 	 	 	
Fortified Chain 	 	 	 	 	 	 	 	 	 	
Buckler Earring 	 	 	 	 	 	 	 	 	 	
Creed Earring 	 	 	 	 	 	 	 	 	 	
===By Equipment Slot===
====Weapons====
:{|class=sortable border="0" width="60%" cellpadding="2" cellspacing="2"	 	 	
Level	Name 	Jobs 	Bonus
69 	Sinfender 	PLD/DRK	+5
90 	Skeld Sword	PLD/DRK	+6
====Shields====
:
Level	Name 	Jobs 	Bonus
30 	Pilferer's Aspis 	All 	+5
40 	Light Buckler 	WAR/WHM/RDM/THF/PLD/BST/SAM	+5
52 	Master Shield 	WAR/WHM/RDM/THF/PLD/BST/SAM	+10
70 	Storm Shield 	WAR/WHM/RDM/THF/PLD/BST/SAM	Assault:+5
75 	Acheron Shield 	WAR/RDM/DRK/BST/BLU 	+10
75 	Acheron Shield +1	WAR/RDM/DRK/BST/BLU 	+11
====Head====
:
Level	Name 	Jobs 	Bonus
73 	Koenig Schaller	WAR/PLD	+5
73 	Kaiser Schaller	WAR/PLD	+6
85 	Creed Armet +1 	PLD 	+5
85 	Creed Armet +2 	PLD 	+7
====Hands====
:
Level	Name 	Jobs 	Bonus
54 	Fighter's Mufflers 	WAR 	+10
74 	Fighter's Mufflers +1	WAR 	+15
77 	Versa Mufflers 	WAR/PLD/DRK/BST/SAM/NIN	+1~5
====Neck====
:
Level	Name 	Jobs	Bonus
60 	Fortified Chain	All 	+3
65 	Shield Torque 	All 	+7
75 	Mu Necklace 	All 	Salvage:+3
====Legs====
:
Level	Name 	Jobs	Bonus
56 	Rogue's Culottes	THF 	+10
====Feet====
:
Level	Name 	Jobs	Bonus
52 	Gallant Leggings 	PLD 	+10
52 	Warlock's Boots 	RDM 	+10
74 	Warlock's Boots +1 	RDM 	+10
74 	Gallant Leggings +1	PLD 	+12
====Waist====
:
Level	Name 	Jobs 	Bonus
30 	Shield Belt	All/active only if subjob is PLD	+5
====Back====
:
Level	Name 	Jobs	Bonus
70 	Boxer's Mantle	All 	+10
====Earring====
:
Level	Name 	Jobs	Bonus
35 	Buckler Earring 	All 	+3
72 	Knight's Earring	All 	+5
90 	Creed Earring 	PLD 	+3