GNB: Heart of Stone - Mitigation: 15% (+Brutal Shell 150 potency shield- in the GNB gameplay shown this equated to roughly 2.5% of the GNBs max HP) Duration: 7s Cost: None Recast: 25s Uptime: 28%
Tankbusters - If MT uses: Rampart - 32% mitigation +150 potency shield or ~2.5% GNB max HP Sentinel/Vengeance/Shadow Wall/Nebula - 40.5% mitigation +150 potency shield or ~2.5% GNB max HPPLD: Intervention - Mitigation: 10% (20% while under the effect of Rampart 25% while under the effect of Sentinel) Duration: 6s Cost: 50 Oath Gauge Recast: 10s (Oath generation limits this to 30s if using on cooldown) Uptime: 20%
Tankbusters - If MT uses: Rampart - 28% mitigation (36% while under the effect of Rampart 40% while under the effect of Sentinel) Sentinel/Vengeance/Shadow Wall/Nebula - 37% mitigation (44% while under the effect of Rampart 47.5% while under the effect of Sentinel)WAR: Nascent Flash - Mitigation: 10% + healing equal to 50% of our Bloodbath-like effect Duration: 30s Cost: None Recast: 25s Uptime: 100%
Tankbusters - If MT uses: Rampart - 28% mitigation Sentinel/Vengeance/Shadow Wall/Nebula - 37% mitigationDRK: The Blackest Night - Mitigation: 25% Targets Max HP Duration: 7s Cost: 3000 MP Recast: 15s Uptime: ??? Due to the MP costs this will only be used for tankbusters as the MP should be used for DPS if TBN wont break.
Tankbusters - If MT uses: Rampart - 20% mitigation +25% MT max HP Sentinel/Vengeance/Shadow Wall/Nebula - 30% mitigation +25% MT max HP
Analysis:
Gunbreaker has a middle of the road OT cooldown. Second only to DRK for tankbusters when compared to the other tanks. GNB has a +4% mitigation advantage over PLD and WAR when no additional resources are spent. PLD gains a +4% or +8% advantage when using Intervention when buffing its effectiveness with Rampart or Sentinel respectively. Heart of Stone is more than effective than PLDs Intervention when defending against fluff mitigation since it has the higher mitigation with 8% more uptime. Nascent Flash wins out in fluff mitigation due to 100% uptime and healing properties.
Paladin as an OT has the most flexibility when mitigating tankbusters. Unbuffed Intervention is the least effective compared to the other tanks. However, when buffed it becomes an extremely powerful tool. The cost is high, but if the PLDs own mitigation skills are unneeded while on cooldown, using them to enhance Intervention makes it one of the strongest OT skills when comparing raw effective mitigation. Intervention fluff mitigation is worse than both WAR and GNB due to its low uptime and effectiveness.
Warrior has the weakest OT cooldown when mitigating tankbusters. Nascent Flash offers the lowest effective mitigation when compared to the other tank's equivalents. Nascent Flash is the BEST OT tool for fluff mitigation. It has 100% uptime compared to PLDs 20% and GNBs 28%. As an OT, WAR offers permanent healing and mitigation to its MT.
Dark Knight has the best OT tool for tankbusters, the MP cost will be refunded as a Dark Arts and it doesn't loose effectiveness when stacking with the MT cooldowns. The Blackest Night is worst at fluff mitigation it has a low duration and high cost, it should only be used in this situation if it will break.
ALL SKILLS ARE SUBJECT TO CHANGE - I was bored and felt like analyzing the tool tips we were given, so this should all be taken with a grain of salt.