Feldon Hirofortis has posted a thought-provoking thread on the EQ2 Forums regarding Critical Mitigation on raid gear and pondering just how much Crit Mit is needed to proceed in raiding. Just looking at the Tier 1, Tier 2, and Tier 3 raid gear available in-game, a player can acquire critical mitigation amounts of 110%, 127.8%, and 141% respectively, not including any critical mitigation achieved by having high numbers in the necessary stats.
Critical Mitigation from Raid Armor Sets
T1 T2 T3 Head 10.00% 12.00% 15.00% Chest 20.00% 20.00% 20.00% Shoulders 10.00% 12.00% 15.00% Forearms 5.00% 9.60% 12.00% Hands 5.00% 9.60% 12.00% Legs 20.00% 20.00% 20.00% Feet 5.00% 9.60% 12.00% Sum 75.00% 92.80% 106.00% Max from Gear and Adorns 110.00% 127.80% 141.00% Max with Gear and Stats 120.00% 137.80% 151.00% Increase Critical Mitigation (Red Adornments)
Head 5% Chest 5% Gloves 5% Boots 5% Shoulders 5% Bracers 5% Leg 5% Total Crit Mit 35% Critical Mitigation from Intelligence/Agility
AGI/INT 500 5% AGI/INT 1000 10%
Critical Mitigation is a measurement of how much your armor (plus a small amount of innate protection from Agility (for scouts/fighters) or Intelligence (for mages/priests) reduces the Critical damage abilities of the enemies you are fighting.
There is a lot of useful information in this thread already — it’s worth a read.