Role abilities to use for WAR

[Mikazuki_Aura]

In descending order of the likelihood I'll ever use it (higher rated skills will fill lower level slots first):

1. Low Blow (except PLD because of Shield Bash, which case I don't take this)
Lv. 12 Ability Instant 25s Stuns target.
Duration: 5s

2. Interject (Unlike Stun, it only works on spells. Only taking it if a boss has interruptible spells AND is 100% Stun-resistant, but not Silence-resistant.)
Lv. 40 Ability Instant 30s Silences target.
Duration: 1s

3. Ultimatum (War-only because their other AoE threat skills cost either TP or Gauge)
Lv. 44 Ability Instant 90s Provoke nearby enemies, placing yourself at the top of their enmity list.

4. Provoke (longest ranged pull a tank has, and also an emergency skill if pug healers go Medica II-happy)
Lv. 16 Ability Instant 40s Gesture threateningly, placing yourself at the top of a target's enmity list.

5. Rampart (damage reduction is 0.2*20/90 ~ 4.44% per second).
Lv. 8 Ability Instant 90s Reduces damage taken by 20%.
Duration: 20s

6. Reprisal (effective damage reduction is 0.1*5/60 ~ 0.833% per second to one target, making this okay for off-tanks and worthless for main tanks - even worse than Anticipation.)
Lv. 32 Ability Instant 60s Lowers target's damage dealt by 10%.
Duration: 5s

7. Shirk (useful for off-tanks and worthless for main tanks)
Lv. 48 Ability Instant 120s Diverts 25% of enmity to target party member.

8. Convalescence (less priority than Rampart as it requires healer input and its CD is longer). More a main tank thing.
Lv. 20 Ability Instant 120s Increases own HP recovery via healing magic by 20%.
Duration: 20s

9. Awareness (assuming critical damage averages 1.5x, this would be 1/3*25/120 ~ 6.9% if used in a scenario where you always get crit (say, together with Raw Intuition). If the enemies' critrate is 30% or higher this will be worth taking over Anticipation.)
Lv. 36 Ability Instant 120s Nullifies chance of suffering critical damage.
Duration: 25s

10. Anticipation (worthless as parry reduction is 20%, so the effective additional damage reduction is 0.2*0.3*20/60 = 2% per second, which makes it less than half as useful as Rampart in spite of requiring a higher level).
Lv. 24 Ability Instant 60s Increases parry rate by 30%.
Duration: 20s

So for instance, if main/solo-tanking:

In a Warrior, I'd take:
Low Blow - Ultimatum - Provoke - Rampart - Convalescence

In a Paladin it would instead be:
Provoke - Rampart - Convalescence - Awareness - Anticipation

While in a Dark Knight it would be:
Low Blow - Provoke - Rampart - Convalescence - Awareness

If off-tanking:

In a Warrior, I'd take:
Ultimatum - Provoke - Rampart - Reprisal - Shirk

In a Paladin or Dark Knight it would instead be:
Provoke - Rampart - Reprisal - Shirk - Awareness

Swap all instances of Low Blow for Interject if the boss is Stun-resistant, Silence-vulnerable AND I am main-tanking. Paladin is a special case as Spirits Within lost its silence, so that would be Interject - Provoke - Rampart - Convalescence - Awareness.