I would like to preface this post by noting that I am KBN's cotank (Emital - Shadow Tank - Ebon Hawk). He's a better mind for analytics so I generally leave the forum to him.
Thats a fairly pointed statement when all you have are your own numbers that in the context of this thread, or anything you can link to, have no analytic backing.
Luckily Kitru and KBN are different people, so discontinuity between statements they make is invalid and non-germane.
This above all demonstrates your own total lack of meaningful experience with this fight (NiM DG), or your abject failure to analyze your own group's performance.
My assertions are numbered for your convenience:
1) The healing check for the first phase of the fight is recovering from lightening field.
2) Tanks in general should take considerably less damage from the preliminary ticks and the final burst than any other member of the raid.
3) As a function of their health and the damage any given member of the Operation is likely to take in the first phase, all lightning field damage on non tank members presents a critical imperative for the healers. Heirad is entirely capable of vaporizing a dps/healer after they've taken a full hit from the final tick of the lightening field.
4) The enrage timer for NiM DG is simply impossible for all but the very top shelf DPS. For those DPS the enrage requires brilliant execution and enviable output.
With those assertions in place it becomes clear that the loss of even 1 dps (under the best case scenario when a battle res is up) causes 5-10 seconds of lost damage output, healing output, rebuff from someone (A GCD best used elsewhere) and a repeated ramp up period.
Meaning, if one of our gunslingers misses their roll they subsequently die to Heirad or require the full attention of a healer to prevent dying to Heirad making tank death much more likely.
Show me a group for which this is not a catastrophic, cascade failure and equivalent to a long, slow, pointless wipe to the enrage timer and I'll show you one of the dozen or so groups that has downed this fight.
In short, your assumptions about what you see in any of those logs and whatever you believe they prove, that cannot be numerically derived, is patently false. If a DPS died to a lightning field in the first phase, we saved ourselves the trouble and wiped it up.
Again, you acting like KBN or Kitru have some ulterior motive in providing this information doesn't help your case.
Frankly, any geared tank (or the healer keeping him up) is going to find ambient damage from sources that preclude defense to be irritating but largely irrelevant in light of the 18k Voltaic slashes that defense will give you a better chance of avoiding completely.
Your insistence that a single variable in the model is so magnificently incorrect as to negate not only the model but the credibility of the people that built it completely overshadows the larger pragmatic implications of what you're suggesting.
If you are going to argue for the complete dismissal of defense from your gear you would have to provide that the resulting gains in shield/absorb/luck/blessings of RNG string will then make it likely that you will never be below the threshold of a voltaic slash (or similar defense-able attack) killing you.
At this point you are extrapolating embarrassment over a perceived inaccuracy into a systemic defense of a system for which you yourself can provide no alternative.
You can spit numbers all day long, as can I. However when it comes to taking issue with the analytic method used to verify this data all you seem to demonstrate is being wide of the mark in interpreting the model.
TL;DR I believe you mean "I disagree with KBN/Kitru/Dipstik on this issue" rather than "KBN/Kitru/Dipstik are lying to everyone because they're embarrassed that I don't agree!"