Can the Ones resist Nihilus' drain?

Yes.

/thread

No.

Is your KOTOR 2 game case crusty?

They fodderize him, lol.

They aren't the Force itself, you know. They are just three Force Balance Watchers(but the Son and the Daughter tasted from two shenenigans of the Force, and one side dominated in them, only the Father remained 'balanced'😉 . They are also part of the Architect species. Remember that even Son's Force lightning didn't turn Obi-Wan into pile of bones. The Ones are strong; but we don't know how strong they are.
We don't know if Force powers won't work on them.

Remember that Kreia said the Killer-Force works even on stronger opponents than you.

Originally posted by darthbane77
Abeloth's Avatar was effected by drain sure, but she and The Ones can only be killed by the dagger.

(The Father's death results in the Son losing his power, thereby allowing Anakin to kill him.)

Where's that from?

The dialogue going on during the gif you posted.

But why is it that his power prevents Anakin from being able to kill him with a lightsaber? Like obviously, he can block it and shield himself against its energies if he's actively focusing on defending against it, but if Anakin were to cheapshot him, what makes it so that the dagger is the only thing capable of ending his existence?

Considering he's a god of unprecedented proportion, his Lesser Force shield would likely suffice in deflecting lightsaber blows.

Perhaps. But then, doesn't that mean an energy source of sufficient power would be able to get past said shield indicating the Mortis dagger is NOT the only available means with which can end the life of one of the Ones?

This thing with Father dead=powerless Son is stupid as fvck. Once again: Why does it happen?!

The Son even tried to kill his 'father' once. I don't know why he'd lose his power; unless The Father created a Force bond with him and the Daughter via harnessing The Mortis' nexus.

Yeah, that whole "Father dies and takes the Son's power with him even though the Son tried to kill the Father" thing was written in by George Lucas.

And we actually do know how strong they are, or at least we have an idea. The Father said he can "Wield the Force like no other" basically just saying they are the most powerful force users out there. This puts him and Abeloth above the Bedlam Spirits, The World Razer, the Wutzek, the Entity, Sel Makor, The Darker, or any other force entity out there. He also says that the Son and Daughter (or even just the Son alone, which implies just the daughter alone) can tear the very fabric of the Universe. And they also seem to be able to manipulate time itself, the Son does so and shows Anakin the future. But the Bedlam Spirits can do this too. The Book of Sith also says that the Ones are powerful enough to tear the universe asunder.

So by gauging these powers, they seem to be unbelievably more powerful than all others that we've ever met. Abeloth is said to be a dozen times more powerful than Luke, but a feat such as destroying the entire universe would make her something like (and this is a complete guess) 1,000,000,000,000,000,000,000 times more powerful. But I guess the amount of time it takes for that Universe to be torn asunder might effect the way things go. Maybe they simply cause chaos by creating violence, which leads to the fabric of space and time suffering consequences, and, over time, that degradation leads to destruction. In that case, the Ones are still incredibly powerful, unreachable by anyone save the Chosen One.

Are the Bedlam Spirits confirmed to use the Force?

I don't know, actually. It'd be weird for me if there was an entity within the star wars universe which gained such ridiculous levels of power without the force. But maybe they were going for something else, I don't know.

"Wield the Force like no other."-could imply a greater Force Mastery, not power.