Originally posted by Hewhoknowsall
Owning of multiple Imperial Knights: we don't know how powerful those Knights were.
Personal bodyguards of the Emperor, one of whom was the Emperor's cousin, and we know that family is strong in the force (likely descended from Jaina).
Took, like, 3 seconds to take all four down when they were expecting him.
Toying with Cade: How powerful is Cade?
Powerful enough to raise the dead, as well as being a Skywalker.
Superiority to Wyyrlok: How do we know?
Even after Wyyrlok took over, he relied on Krayt's reputation rather than his own strength. The One Sith feared Krayt's power but not his.
Also, from the latest legacy:
Spoiler:
Krayt survived Wyyrlok's and Muur's attempts to kill him!
And how do we know how powerful Andeddu is?
Powerful enough to survive as a spirit for thousands of years and be a great Sith Lord in his time who's legend lived on.
Pretty much everyone went to Andeddu as a go-to guy for Sith knowledge of immortality, including Bane and Dooku.
Dr McBeefington
As Muur said, Krayt himself was a Sith Zygote. Andeddu claimed that his apprentices showed more potential than Wyrrlok. Now is any of that true? Who knows. But KRayt's sith seem to be the weakest order. I'm impressed by the looks of the True Sith's Dark Council.
We saw how well Andeddu's apprentice claims held up when Wyyrlok not only destroyed him but tricked him at the same time 🙂 We also know that Muur said Krayt was certain to defeat Celeste, and this is a century after Celeste gave Vader a fight and had spent that time in constant mental struggle to grow stronger.
The problem with those is every Sith claims how superior theirs was. Muur might or-might not be even stronger (his talisman did make Andeddu's look like a chump, and Vader sensed that with it's power he could overthrow Palpatine, so I could buy it, purely on the 'Muur is a badass' level), but the One Sith still have a lot going for them.
They don't have too many high level master types, Krayt and Wyyrlok mostly, but they do have quite a few of significant power and skill, like all the Hands, Maladi, Saarai, and Azard.
The One Sith don't have many really high up Sith, but they do seem to have quite a few solidly skilled ones. It'd be fun to see them take on Kaan's Brotherhood.