Honestly, on-point (at least about Starlight; Sunset was never that interesting to begin with).
On my last rewatch of FiM I was shocked by the lack of empathy and the callousness of early Starlight. She grows a conscience eventually, but no thanks to Twilight, who seems to have missed the point. Twilight is on about “it’s a friendship lesson, not a baking lesson,” when she should have been explaining to Starlight the basic principles of morality that she failed to grasp: “You see, Starlight, my friends are real ponies, not tools or objects to be used to your personal gain, who deserve your respect and from whom you must obtain consent.”

@Background Pony #4ABD  
I haven’t read NMR, and DPDoMS makes perfect sense to me. Q.E.D.

Alright, enlighten us. What are these inconsistencies?

@Sunset’s Minion: I’m not grasping at straws at this point, though. I’m simply stating the facts. You’re basically telling me that you feel that the NMR arc doesn’t fit in with DPDoMS because your own headcanon has trouble trying to make the inconsistencies make sense. And you haven’t even gotten into the various inconsistencies that arise when you remove the NMR arc from the equation. Removing NMR from the equation doesn’t work because a lot of things, not just DPDoMS, wouldn’t make sense. Heck, I’d even argue that DPDoMS shouldn’t even happen without the NMR arc considered.

@Background Pony #4ABD  
You’re just grasping at straws at this point. We’ve debunked your theory many times and you refuse to accept that the comics simply are non-canon at worst and an alternate universe at best. Have fun living in your delusional fantasies.

@redweasel: It wasn’t just guilt that was affecting her during the Nightmare Rarity arc, but it was also a lack of self-worth and powerlessness in the fact of the threat of Nightmare Moon’s return. Nightmare Moon, as Nightmare Rarity, outright exploits this. The only reason why she didn’t depower in DPDoMS is because she felt that the Tantibus situation could be handled, and the stakes were smaller. DPDoMS doesn’t “invalidate” anything.

@redweasel  
Thanks.
 
Yeah, at best the comics are simply an alternate universe.

@Background Pony #4ABD
 
the theory that she powered up for “reasons,” then depowered to woona because she felt guilty, and just pretended she’d never been empowered, is invalidated by do princesses dream of electric sheep. luna felt super guilty in that ep, yet remained powered up. nightmare rarity simply didn’t take place in the same continuity as the show.

@Background Pony #4ABD  
I could try to argue with you…
 
But I don’t feel like wasting my time and energy on someone who will dodge it and whine about how I don’t count the comics as canon.

@Sunset’s Minion  

Except I didn’t ignore that. I said that the NMR arc happens before DPDoMS, and gave you justification for Luna’s behavior in the the latter. If there’s anyone that ignored anything that was said to them, it’s you.
 

No she wouldn’t. In fact, the Nightmare Rarity arc helped boost Luna’s popularity. Making her transformation into Nightmare Moon more believable.

@Background Pony #4ABD  
I gave you reasons why Nightmare Rarity and DPDoMS cannot both be canon at same time and you ignored it, what else am I supposed to think? By the way, if they were, then Luna would be quite a lot less popular than she is, I’ll tell you that much.

@redweasel: Except Nightmare Rarity takes place after Luna Eclipsed. As I already mentioned.

@Sunset’s Minion: Insults don’t make your viewpoint more valid than anyone else’s.

@Background Pony #4ABD
 
nightmare rarity isn’t canon because of luna eclipsed. you know, back before they were afraid to defy the fans.

@PonyPon: Happens Luna Eclipsed happens before the Nightmare Rarity arc. And being given powers =/= being the original owner of those powers.
 
This review of the Nightmare Rarity arc can explain it better than I can.

@Background Pony #4ABD  
What about Luna Eclipsed?
 
Or just Luna’s first line upon becoming Luna again?

@Sunset’s Minion: I take it you concede defeat?

@Background Pony #4ABD  
Believe what you want….

@Sunset’s Minion: You’d be surprised what being possesed can do to someone over a long period of time such as 1,000 years. If Rarity truly felt cold, dark, and lonely while she was possessed by Nightmare Moon, then just imagine how Luna must’ve felt since she put of with those same feelings for much longer.

@redweasel: No. She simply never forgave herself for letting herself getting possessed. Any notion that the Nightmare Rarity arc isn’t canon because of Don’t Princesses Dream of Magic Sheep is simply from reading too much into things.
 
Also, the Nightmare Forces are only a single entity. One that arguably made a name for itself in Ancient Anugypt. And one can argue that the black stuff that surrounded Luna as she became Nightmare Moon was the Nightmare Forces. Plus, the meaning behind Nightmare Rarity’s words when she says “Your powers have defeated me before, little ponies” is obvious.
 
@PonyPon: You do actually kinda do need the Nightmare Rarity arc to establish Luna’s guilt in Do Princesses Dream of Magic Sheep. It wouldn’t make sense otherwise, as it would have no justification.

@redweasel  
If DPDoMS came before the Nightmare Rarity, it wouldn’t make sense because Luna wouldn’t have a legitimate reason to withhold the truth of the nightmare forces.
 
If Nightmare Rarity came first, it still wouldn’t make sense because then Luna wouldn’t have a legitimate reason to keep being punished by the Tantabus because she already had all the encouragement she needed from the aforementioned arc.
 
 
They are the exact same story told two different ways. If try to count them both as canon, they’ll pretty much cancel each other out.

@PonyPon
 
yes, if you consider the comics to be canon. but the show only showed luna get covered in darkness and turn nightmarey. the show didn’t specify that there were nightmare forces as several individuals with names like shadowfright, jerome and larry.
 
luna went nmm before even going to the moon, so what made her that way has nothing to do with the shadow forces. really the shadow forces were just dream uh… boogies that also got corrupted by the nightmare, whatever it was.
 
if you consider the comics to be canon, the nightmare also corrupted apples, but the apples aren’t the source of the corruption, just horribly bad writing we all wish we could forget.

@redweasel  
Does it count as an external entity if it’s something you made on your own, without visible influence?
 
I don’t recall the Tantabus being like the nightmare forces, more like an animated, self-propelled spell of singular purpose.

@Background Pony #4ABD
 
the tantabus episode does establish that the nightmare could have been an external entity, that princess luna created.
 
the nightmare rarity arc still isn’t canon though, because in luna eclipsed, princess luna said that the ponies of ponyville never liked her, despite already being powered up.