General consensus is.
If you want to play a tank, you should be playing world of tanks, because tanks in this game are DPS class that lives only because healers heal them. xD
Idk why people are obsessed with mitigation all that much, its not like warrior has it any better.
His tank stance only gives him bonus heal, it will not save him from tank buster.
Raw intuition is straight 20% dmg reduction from parry, vengeance has 30% same as the DRK one cd.
He has 2 heals, 1 of which increases his hp by 20%, has shake it off and thats it.
But he lacks a proper tanks stance, he doesnt have any dmg reduction from it, DRK has and has a TBN, those both are enough to sustain any tank buster you want and you could do extra by activating CD ability.
Since most of the tank busters are magic based (i think they are :P), DRK has 2x 30% mitigation CD, a good shield, 20% perma dmg reduction, and role cd.
Paladin has sheltron, sentinel which is 10% stronger than DRK or warrior has, 20% damage reduction stance, hallowed ground, useless bulwark for tank busters and well a shield, but it doesnt matter if you keep using it for sheltron, and a heal that will only hurt you using it.
So whats the point?
DRK is way more useful againt tank busters, paladin has his use on dungeons pull, and warrior is something in the middle.
Let me sum it again
DRK:
- 20% damage reduction stance
- 20% hp shield with 15 second cooldown that does not hurt your dps to use it
- Dark mind 15-30% magic reduction on 60 sec cooldown
- shadow wall 30% on 180 sec
- Living death 300 sec cooldown
Warrior:
- 20% healing boost stance - it will not save you if the boss suddenly decide to rip 90% your health bar off, you will need to pray to the healer.
- 60 sec cooldown heal, well this will not make you tankier either.
- 20% heal/hp increase 120 sec cd
- vengeance 30% on 120 sec cd
- Holmdgang 180 sec cd
- Shake it of, 8% hp shield every 60 sec, could be use with some other cd's to increase effeciency, but to be honest its not perfect, and need a perfect timing to make a full use of it. Its perfect party shield, but lackluster tank buster deffence.
- raw intuition 20% mitigation from parry only on physical dmg 90 sec cd, im pretty sure its useless in sigma, at least not as a tool that will help you surviving some stuff, and oh dont turn around or you will get hit for 50% hp. xD
PLD:
- 20% dmg reduction stance
- Sentinel 40% on 180sec
- bulwark 60% more blockrate, barely any use on tank busters and etc 180 sec cd
- tempered will, passage of arms, intervention, cover are utility abilities will not make you harder to kill to the boss
- divine veil, a shocking 10% extra hp, 120 sec cd, good for party to have
- shieltron guaranteed block around 20% mitigation, need gauge and the fastest way is to auto attack with 2.8 sec delay for 5 gauge each, and this takes around 25-30 seconds to recharge, faster if you use holy spirit, but still it takes half of the mp bar to use holy spirit and due to that resource is far worse to manage than MP for DRK used for TBN, and DRK doesnt even need to turn the stances, where PLD kinda needs to, block frequency is all random and makes it impossible to stack gauge if you fight 1 target.
- hollowed ground and 420 sec cd
- clemency, that will only help your team to hit enrage timer
So? Where is that giant disadvantage in mitigation?
Nowhere, pld may seem only better in dungeons and bigg pulls, DRK is more reliable to tank the main content of the game he doesnt have almost any utility, but he is easier to tank, PLD is superior as a support tho and warrior is for dem dps records.