I believe that you have not understood what I was trying to write or that I didn't perhaps explain myself well enough. Either way, I'll try to reply to your points as best as possible.
While you're right in the sense that nDPS is usually mostly relevant when comparing performance to other players without taking buffs into account, it can still be a useful metric to understand specific differences between jobs. For example, if we posit that RPR is a job in theory meant to have higher personal damage than other buffing jobs due to having a weaker 3% buff, then ideally its personal damage (nDPS in this case) should be higher than that of a job with a 5% buff such as PCT.
However, since PCT tends to have higher aDPS than RPR, we can then use the nDPS/aDPS comparison to realize that despite having lower personal damage when not taking buffs into account (nDPS), PCT is able to put more potency into buffs, as several fights of the tier at different percentiles attest.
For the sake of completeness, nDPS also equals rDPS for non-buffing jobs such as SAM, VPR or BLM, just like cDPS equals aDPS. The relevance of the differences of each of the four metrics is clearer for jobs that provide buffs than those that don't.
Therefore, it is logical that it's the buffless or "selfish" jobs leading the nDPS charts, as they should. Do note that the sentence of mine that you are quoting explicitly says that PCT is higher than the majority of melees at the different metrics, meaning that it's higher rDPS-wise than all of them but it obviously won't be higher aDPS-wise than SAM, VPR or BLM. In that sense, I do further clarify later on that PCT is right after these jobs in the aDPS charts, meaning that it's above MNK, RPR, DRG and NIN.
As explained in their webpage,
"cDPS stands for "Combined DPS" and is measuring how much damage you've done with single target padding removed and adding how much your damage you've given to others with your buffs. [...] cDPS allows you compare how well you and your raid played into burst windows and AOE buffs. It's a good way to look at job balance between each other, and seeing which jobs have strong buffs while also providing good damage during other job's AOE buff windows."
cDPS is basically a "combination" of rDPS and aDPS and does have the ability to help us understand balance between jobs. The main caveat is that all metrics (except nDPS) are affected by party composition and, while cDPS is the one affected the most, so is aDPS.
Like rDPS, cDPS does include the single target buffs from AST and DNC but only in the "rDPS portion" for those two jobs. It is actually aDPS that does not include them for the jobs receiving the buffs.
In essence, cDPS can be useful to analyze overall job balance, particularly if party compositions are similar.
No metric is perfect. Some jobs will favor rDPS while others will favor aDPS. This is why I think that taking them all into account is the best approach when discussing job balance. As imperfect as it can be, this is the data we have to work with because we have no access to SE's internal numbers.
I don't believe that using a single fight in a Savage tier comprised of four can paint an overall picture of job balance because different fights may favor one job or another due to different reasons such as difficulty to keep uptime or hold resources for burst.
Regardless, my argument is not that PCT should be nerfed or that it's entirely unbalanced. In fact, in a previous post I conclude that the balance of this tier is mostly fine (besides MCH). My point is that PCT is still quite strong at several areas despite the buffs most other jobs got.
As I already said, we could argue that the differences are small enough not to matter, and that would be just fine, but I still believe that if PCT is to have higher aDPS than jobs with less personal damage such as NIN, then its rDPS should be a bit lower than theirs. I don't think it's healthy for game balance to repeat situations such as SAM in ShB or BLM in the later parts of EW. On the other hand, it could be argued that as long as any job can clear the content, these difference don't matter too much.
Where does it say that BLM cannot? What I'm saying is that its capacity to abuse buffs is lower than that of SAM and VPR, which may not help the job in the landscape of putting the maximum amount of damage in the 2-minute burst windows, particularly if BLM has to use those resources for movement.
PCT is balanced around doing no damage for a specific amount of seconds while casting motifs. Any amount of downtime that reduces this no-damage period during uptime phases will hugely benefit the job. Yes, other jobs can recharge their CDs such as NIN's mudras but those are not balanced around doing zero damage for specific periods like PCT is.
Considering how common downtime tends to be in high end duties, this specific quirk of PCT is quite beneficial to the job because it further increases its damage potential. I do agree that we will know for sure when FRU is released.
In conclusion, I don't think PCT should be nerfed. I do believe it could be adjusted by moving some damage from burst into filler to avoid the potential balance problems in Ultimates or other relevant content when downtime is involved while keeping the overall full uptime damage the same. Additionally, I don't think the job should lose its utility or defensive capabilities either. If anything, what other jobs have should be reevaluated without falling into the homogenization pitfall.
PCT should be balanced within the "more damage group" just like BLM. I don't think we disagree in this particular point. But I still think the job excels in several areas compared to others, as I have already explained.
I will say though that I am here to provide feedback and discuss the state of the game. I have done so in a polite way and I don't think I have been hyperbolic in my posts. If you don't like or disagree with something that I write, I'd appreciate if you returned the gesture and engaged in fruitful discussion instead of coming guns blazing accusing others of being ignorant. If anything, it is your own post that contains misconceptions and hyperbole at times.
Just so that it's clear and we don't waste each other's time, I will refrain from replying again to a post with a similar tone as your first one.