Gamemako, since you seem to have everything in a simulation-esque spreadsheet format, perhaps you could construct another situational chart for me...

Basically, if we assume that Twintania's Death Sentence is every 30s, and hits for about... 5k unmitigated, for example, and has regular autoattacks that hit for 1.5k unmitigated (feel free to step in if you have more accurate damage numbers), then what does the long term (7 minutes) mitigation look like for PLD and WAR under the following methodology...

PLD uses Rampart, Sentinel, or Hallowed Ground in that order, as available, a few seconds before each Death Sentence, and no other cooldowns during autoattacks.
WAR uses Vengeance or IB as available, a few seconds before each Death Sentence, such that when Vengeance will not be available, the WAR will save Wrath stacks for IB for the coming Death Sentence.

Hope that made sense. =)
Basically on Twintania, the biggest single source of damage is Death Sentence. So if both tanks selectively use their mitigation CD's to reduce the effect/danger of Death Sentence, who comes out ahead?