
Originally Posted by
Weetzlo
....
You're still overcomplicating this slightly.
That's not to say that you're overthinking this. Rather, you're pushing into the question concerns that are best addressed separately.
Also, if you want us to "look at" and adjust "the whole ability" --and I do mean you, as that is quoting you, not the OP -- that means adjusting not just what's added at lv82, but also what comes before.
DRK's defensive kit at 70-81 should be competitive with the other tanks' 70-81. 82-86, competitive with other tanks' 82-86. 87-90... you guessed it. You don't fix problems with the lv82 skills' parity by adjusting the level 70 kit, nor do you, say, fix LD, by buffing TBN after level 82. You adjust what's added over the span in question.
Meanwhile, fixating on the coverage of percentile mitigation without some way of considering its value against potency is just running in circles. You'd need to pick a benchmark:
Percentile mitigation will be balanced around defensive (curative or absorptive) potency by selecting a particular 'standard' of DTPS (damage taken per second) likely to occur over a given span.
If we take a higher DTPS standard, such as Expert Roulette double-pulls, then potency hold up against percentile mitigation even in those situations while potency is superior if the DTPS is lower than that standard and percentiles are superior if the DTPS is higher.
So again, you pick a situation as your standard, such that percentile mitigation over 8 seconds of that situation should nullify as much damage as the potencies would absorb or heal.
Given that standard, would the 40 seconds per minute of 10% mitigation that the OP has suggested be traited atop TBN exceed the value of the 8-9.6 seconds per minute of mitigation and potencies of its competing traits? That's it.
I'd need a standard by which to find pre-active-mitigation DTPS and determine whether that the suggested buff would be overkill. Ideally, I'd like a rationale, too, as to why that standard would make sense (e.g., because it renders more similar mitigation+healing over time between jobs and therefore seems the more likely intended balancing point). But that's the whole of it. It's either noticeably greater than its competing trait's values and may be OP, noticeably lower and UP, or it's roughly balanced. But the best way to figure that out is simply to compare this suggested trait against the other traits. DRK's lack of self-sustain, etc., should be addressed separately as such, not as part of its lv82 trait.