Originally posted by Lightsnake
1. This unknown Sith was not a 'subordinate' of Sadow and Kressh. The Destruction of Ambria happened centuries after they died.
She wasn't at the time, no, but she had been, back during the GAotS. She fled to Ambria after the Ancient Sith's forces had been defeated and driven back by the Republic.
2. It was not intentional nor done with 'one attack.'
Yes, it was. She had attempted a ritual that was said to have called on more power from the darkside than ever before, it failed, and in anger, she lashed out with a Force Wave that decimated the Planet's entire inhabitants.
It was a long ritual
No, the ritual had nothing to do wit it, it was an impromptu, separate action that was made in response to the failing of the ritual.
coupled with a battle against Thon that went wrong. Not 'blink and destroy planet.'
I'd suggest knowing what you're talking about. Thon only ever fought her spirit, years later, way after the attack that devestated the planet had taken place.
3. The Sith Lady attempted said ritual, one, which it's said 'was well beyond her means of succesfully performing,' using a 'giant Sith obelisk.'
Again, the attack that I was speaking of was completely separate from that.
4. The ritual attack gone wrong wiped her out too
First correct statement you've made yet. Though, it still doesn't undermine much anyway; it's the fact that she was capable of such power in the first place that's impressive.