Originally posted by The_Tempest
Such as?
The Heresiarchs, the Krath, the Sorcerers of Tund....
This assumes that in the millennia between Vitiate's reign and Sidious's that none of the Force cults modified their knowledge base either through development or refinement.
To an extend, your objection is correct.
But then, with your previous statement, you assumed that those Force cults had techniques fundamentally different from what the Sith or Jedi had developed and - in case of the Sith based cults - that their knowledge base developed fundamentally different from that of the surviving Sith. And, on top of that, you seem to think that Sidious (and Plagueis) learned quite a lot by delving into that rather exotic force cults. But then quantity (of sources) doesn't translate into quality (of teaching).
In addition, you apparently assume that Vitiate, having a millenium of time at his disposal, did nothing to broaden his own knowledge in the force. That would appear to be somewhat unlikely for a Sith Lord - even one with Vitiates already formidable abilities.
That aside: Given that we have next to no idea what Sidious may have learned from the study of the more "exotic" force cults, proclaiming that he must have broader knowledge - considering the aforementioned arguments - appears to be somewhat speculative.
It does not follow that an organization's (or individual's, for that matter) political or historical significance is a reflection of the quality of their Force teachings.
Correct.
But, ultimately, Force cults following the Sith codex - at least to a certain extend - would always strive to seek dominance over others. Apparently, this didn't happen, save for a brief uprising of the Krath. For the other groups: There seems to be no relevant teaching that can be traced back to one of the Force cults Sidious did study, so I wonder what kind of "broad" knowledge they had to offer.
The Aing-Tii developed the ability to fold space and flow-walk, not to mention fighting-sight; The Fallanassi developed highly advanced illusions and the memory rub technique; The Baran Do sages possessed techniques that enabled Force users to manipulate the weather and channel electricity and conceal oneself from detection, etc.None of them achieved any real impact on galactic history (at least directly).
The Aing-Tii and the Fallanassi were rather reclusive and hence had no hand in galactic history. I'm a bit curious why you notice them, because they clearly don't belong to the Force cults whose secrets Sidious learned. And the abilities of the Baran Do Sages were not exactly unique and apparently inferior to those of the Jedi.
Plagueis's personal library on Aborah, which is by 11-4D's reckoning finer than any short of Obroa-skai and the Jedi Temple, carries texts regarding the Sorcerers of Tund, Followers of Palawa, Chratos Academy, and the Order of the Dai Bendu (Chapter 5: Homecoming; page 61 on my Nook for PC edition).
Let me just quote the passage to demonstrate the goal of my criticism. It is said, that the library of Plagueis contains:
"Ancient histories of the Rakata and the Vjun; texts devoted to the Followers of Palawa, the Chatos Academy, and the Order of Dai Bendu; archives that had once belonged to House Malreaux; annals of the Sorcerers of Tund and of Queen Amanoa of Onderon; biological studies of the ysalamiri and vornskrs of Myrkr, and of the taozin of Va'art. Certain long lived species, like the Wookies, Hutts, Faleen and Toydarians, were afforded galleries of their own." - Star Wars: Darth Plagueis, iBook, Chapter 5: Homecoming, p.63
And what does that say about the very content of all that works? We learn, that there are subjects like history and biology involved. But does that passage speak about hidden teachings that could be important to a force user? Plagueis himself, for starters, didn't show much respect for the "ancient" Sith teachings:
"In secret he [Palpatine] continued his Sith training, accepting the absense of actual guidance from his Master as a sign that he was meant to stretch out on his own. An dso he did, delving into many of the ancient texts Plagueis dismissed as worthless, including treatises on Sith sorcery and holocron construction." - Star Wars: Darth Plagueis, iBook, Chapter 19: The Trials, p.218f.
Plagueis specifically advised Sidious, to discover the dark side in his own unique way, shunning the use of Holocrons in the process:
"But holocrons contain knowledge specific and idiosyncratic to each Sith who constructed them. Real knowledge is passed by Master to apprenticee in sessions such as this[...]" - Star Wars: Darth Plaguies, iBook, Chapter 13: Riders on the storm, p. 159
On the same page, just a little before that, he tells Sidious that there is nothing to be found on the former Sith worlds but Jedi, treasure hunters and empty tombs. So, even though Sidious does study some of the stuff at hand during his career, one could still question, how "broad" his knowledge became and how much he had in comparison to beings like Vitiate.
True, but that was knowledge lost between Bane and Plagueis, which means it is very possible Vitiate himself did not possess it. Not to mention that Sidious had decades after the novel to recover such information. Among the most important techniques was that of the essence transfer, which we know Sidious to have recovered during his reign as Emperor.
Apparently, you've fallen victim to the way of thinking Lightsnake once introduced to the forum, which is a miraculous generation of knowledge ex nihilo for the Sith of Bane's order, especially Sidious. What do you think where there knowledge came from? Did they exclusively invent stuff in the 1000 years out of nowhere? No. They started with stuff whose progenitors were the Ancient Sith and apparently aspired to knowledge those former masters of the force had at their disposal. There are enough passages in the Plagueis novel to tell us that much (all books from the iBook version of the novel):
"In Bane's age a Sith might have had to guard against an attempt at essence transfer by the deceased - a leap into the consciousness of the Sith who survived - but those times were long past and of no relevance; not since the teachings had been sabotaged, the technique lost" - Chapter 1: The Underworld, p.29
"If one accepted the tales handed down in accounts and holocrons, the ancient Sith had known how to accomplish this [extending their own lifes].[...]Some commentators claimed that the ability to survive death had been limited to those with a talent for sorcery and alchemy." - Chapter 5: Homecoming, p. 65
Right after that quote, Plagueis mentions that the essence transfer into another being or a clone (hint: Sidious) was a lesser surrogate for the aforementioned abilities. And not that they have never discovered all knowledge the Ancient Sith had - they even lost most of the stuff the did found, thanks to Gravid:
"[...]Gravid became convinced that the only way to safeguard the future of the Sith was to hide or destroy the lore that had been amassed through the generations[...]he had attempted as much, and was thought to have destroyed more than half of the repository[...]" - Chapter 25: The discreet charm of the meritocracy, p.281
So, yes, I'm somewhat reluctant accept statements that happily proclaim beings within Bane's order to have a "broader knowledge" than members of the Ancient Sith Empire, especially a being that had lived more than 1000 years. If you think that Sidious could have learned a nice deal about the Force in decades, why, pray tell, can't you acknowledge the idea that somebody who had centuries to do the same would probably learn even more?