Warrior tanking stat questions/general questions?

[drummer4261900]

Warrior tanking stat questions/general questions?

INFO:
Hp: 152,309
Stamina:7806Dodge:11.58 %Parry:12.57 %Block:43.81 %Expertise:16Hit:8.3%

Ok i have been told that you need a avoidance of 72% to be 100% unhitable. My avoidance is roughly 73+% using this calculator:
/script DEFAULT_CHAT_FRAME:AddMessage(GetDodgeChance()+Get BlockChance() + GetParryChance() +5+(GetCombatRatingBonus(CR_DEFENSE_SKILL) + 20)*0.04,1,0.5,0)
So my questions are I know you dont "need" hit unless your interupting but is it bad to have hit once your basically "avoidance caped"? Or will it help you more to have more avoidance? Also I have only tanked twice so I am very new to this and a warrior tank i know told me that once "vigilance" kicks in that it helps with something? I dont know what vigilance is? what it does?

Thank you all in advance!!!!!

[klausi]

You need 77.4% combined dodge+parry+block+miss (=5% base) to become "unhittable" during shield block. Any point above that 102.4% (via +25% from shieldblock) is transfered into critical block so nothing is lost and it's advisable to increase your avoidance and migitation values as high as possible.

The warrior wanted to tell you that holding aggro is easy after Vengeance (http://www.wowhead.com/spell=93098) kicked in. It raises your attackpower to absurd high values and eg let your shieldslam crit for 60k and more. Vigilance (http://www.wowhead.com/spell=50720) is a warriors talent that helps keeping your attackpower high (via Vengeance) while offtanking.