@Background Pony #F7CA  
We’re talking about RD here, the fastest and most special pegasi that exist. As i said if you want to use a Master of Unicorns as a scale, you should also do a master of a pegasi/earthpony, who would be stronger than regular ponies.
 
Let me paint you the scenario, again: Twilight uses that spell to capture RD, however RD is such a strong flier it tires Twilight out. Twilight can’t move to keep the spell in tact. Eventually Twilight tires out and releases the spell freeing RD. RD is also a bit tired out, but can keep going.

@Kibate  
I’m just saying that if she put that focus into immobilizing one pony it would be no contest.

@Background Pony #F7CA  
That immobilizing an entire battle thing was VERY difficult for her, she could barely hold on. In just another minute the ponies would have been free and she couldn’t even do anything in that time she hold them, and she would have been tired out by that magic while the ponies she held were fine. And those were just regular ponies.

@Kibate  
Well, Starlight and Twilight have been shown immobilizing ponies with their telekinesis multiple times, encasing the pony completely. In fact, Twilight immobilized an entire battle of ponies who were obviously trying to hurt each other. I think that immobilizing one pony is a whole lot easier than immobilizing an entire battle of ponies in action, seems like child’s play in comparison.

@Background Pony #F7CA  
Telekinesis works like muscles, the stronger and heavier the object, the more difficult it is to move. RD would just need to constantly fly away at superspeed and she would eventually outfly it. The example you mentioned wasn’t a serious getaway at all.

@Kibate  
I don’t think you can outrun telekinesis. I remember Twilight stop a fast moving Rainbow by yanking her by the tail. Keep them immobile for a few seconds and you can put the mind whammy on them. What kind of defense do they have against that?

I think Starlight has a unique ability to duo cast spells Final Fantasy style.  
This is giving me flashback of Terra Branford duo casting Flare.

@Background Pony #F7CA  

 
That is the first real proper argument. However i can answer that one: Rainbow Dash. If Twilight is a master at being an unicorn, then Dash is a master at being a Pegasi. Considering the feats we have seen Dash do in the show, she could easily take twilight on.  
Yes, all magic spells combined Twilight would own Dash, but that is not something unicorns can do, not even alicorns. Performing big spells take a lot of time and concentration. This is why Twilight and Rarity couldn’t do much against dragons in Spikes episode this season. In a serious fight, RD would simply dodge all direct magic attacks and Twilight would merely cast teleportation spells and shield spells to protect herself from an assault.

@Ping_chan  
yep

@Background Pony #F7CA  
Can’t you tap a unicorn horn with your hoof to “switch off” it’s magic? I think that happened in the show once or twice?

@Background Pony#F7CA  

 
so because there’s two there has to be more?
 
that’s a very interesting logical leap you’re taking, there. and very headcanon as well.
 
I will agree that no earth pone or pegasus could stand up to twilight or starlight, but again, the argument here is that those two are extremely exceptional unicorns(well, unicorn and alicorn) and that the vast majority of unicorns can’t get anywhere near their levels. If you want to headcanon that those types of power levels are more common that that, then feel free to, but nothing indicating that has been “demonstrated”.

@Blissey1  
Alright, show me an example of any pegasus or earth pony that could stand up to a powerful unicorn and I will concede to you. At first I thought that Twilight was an aberration and unique due to her attunement to the elements but then Starlight came into the picture. She was not exactly friendly yet can easily take a pony’s cutie mark making them docile. She just flicks her horn and takes ponies’ wills as if it is completely natural. I’m starting to think that more of these powerful unicorns exist. The world is a big place.

@Background Pony #F7CA  
I think it’s apparent it takes more than hard work.
 
I’d think Trixie is obviously a hard worker, but a much better, less fanwanky example is Sunburst.

@Background Pony #F7CA  

 
not really, no. the only unicorns we’ve seen casting real high level spells are twilight and starlight. If anything you’re the one headcannoning that all unicorns are capable of those feats.
 
 
@Background Pony #F7CA  

 
yeah, she discombobulated them via telekenesis, some minor weather control, and color changing something. real high level magic there, huh? and btw, her cutie mark indicates that her talent actually is magic in some form, so even then trixie isn’t a standard unicorn in that respect.

@Kibate  
What you said is headcanon. What I said is demonstrated. Trixie is not exactly gifted yet was able to discombobulate the mane six, she was simply a unicorn. The only thing that could beat her was a more powerful unicorn. Starlight’s backstory demonstrates that hard work is what makes a unicorn powerful, therefore any unicorn can accomplish greatness in power. The difference is that earth ponies and pegasi cannot attain the same level of power no matter how hard they try due to them not having a horn. It’s almost the difference between a superhero with powers and a normal person. An unfair advantage.

@Background Pony #F7CA  
neither can 99% of all unicorns. I don’t think you quite understand how rare it is for unicorns to know more than 2 or so spells(and one of them is almost always just moving stuff with magic). And even those that they do know are very limited in their usage.  
Like, take Rarity for example. Her special gift is to find gemstones. And yet Twilight was able to learn that spell AND increase it thousand fold.
 
You could say unicorns have more variety in what they can become, but that’s about it. That’s hardly “OP” (especially if the show will make it canon that pegasi can become alicorns too, which is currently in the “maybe” category)

@Kibate  
Sure she’s exceptional but other non-unicorns cannot ever attain things like mind control, super speed, or the ability to dominate an entire town no matter how exceptional they are.

@Background Pony #F7CA  
Actually no, because Starlight glimmer was from the beginning exceptional at magic. It would be like saying, anyone with Legs can run a world record because there is one person in the Olympics who can run fast

@Background Pony Number 17  
From now on, anyone who complains that I say “unicorns are OP” is wrong.

@Background Pony #F7CA  
That was sort of the problem here.

“I can effortlessly control other ponies.”

She was actually pretty cute like that

Pinkie: “Mmph mphna mprh, hurr mph phrr.”

“Hmm, what other spells can I cast to fix my Pinkponk?”

Life size Pinkie brushable.