This situation may bring some new light to the subject.
The issues of Marka Ragnos and Darth Revan are complex ones. On the one hand, both are described as immensely powerful. Yet on the other, that does not describe what they are like, compared to other Force users. Sidious and Dooku have also been described as immensely powerful in EU works.
Part of the reason is of Kreia's infamous quote:
"We are all like children compared to the Sith of old" or something of that nature.
The funny thing is this. Kreia is a liar. A dubious source. One could argue that Kreia has no reason to lie, and indeed, she doesn't. But she is also a non-canon source describing on things that later blend with canon material. As such, her words are negated.
Ragnos has shown to defeat Simus. Revan defeated Malak. We all know that Ragnos was feared by all other Sith and that Revan was the most powerful of his time. But does that really comment on Ragnos's power. Does that fear warrant him victory over an instakill technique? No. As for Revan. There is no proof that would say he was strong enough to take down Sidious or Dooku. We all (even me) like to think that he could, but there is no proof supporting it.
The fact of the matter is this.
- Kreia can wave her hand and drain Jedi Masters of the Force to the point where they are instantly killed.
- Sidious can summon Force Storms capable of ripping apart entire fleets and transporting people across the galaxy.
- Luke can emit lightning from his fingertips that instantly kill its victim.
- Exar Kun can freeze thousands of Senators in place.
Where can you all argue that the ancient Sith have done better? In the cases of Ragnos and Revan, you can't. Fear is a fickle thing. Sidious was powerful, and he feared an untrained Luke. So, obviously - by your standards - this is a sign of inferiority. And for all of you Dooku fans. Dooku feared Sidious. So I suppose he is inferior to his master as well (I think he is, but many argue otherwise).
The point is this. Revan and Ragnos have a load of fear and rumors. So what? Until you can prove to me that they can survive instakills, or have instakill abilities of their own, I see no reason why Exar Kun, DE Sidious, NJO Luke, and Traya can't rape any of them.
Then again, I operate on fact. Not fiction.