lol since when? Aside from Revan and Kun who could be as strong as the ancients, we don't see anyone that's uber elite. In fact, all of them learned ancient sith techniques, yet Revan is the only one with vast ancient sith knowledge. I fail to see how any one of them can challenge the most powerful DLOTS of the ancient sith who ruled over a century during the pinnacle of dark side power. I don't see any other sith other than Sidious achieving close to that.
Well..ya know, Nihilus is just way stronger than Revan, right?
Or do you somehow think Revan, who doesn't have any quotes or feats to quantify his power is even close to Nihilus', is anything special when compared to a guy who kills planets?
And yes, they can. Ragnos required a scepter to do something Nihilus could do on his own and in greater effect. So much for the most powerful DLOTS who is kinda pathetic compared to all the Sith who came after him. Particularly Sidious and Nihilus. Confirmed fleet-destroyers and planet-killers while Ragnos' people threw bricks.