Reading the thread. For the Vader section, you can scale Rebels Maul off Vader's LOTS showings like:
Vader, too, lifted a hand and reached out with the Force toward the other ship.Vader enmeshed himself in the Force, in his seething, ever-present wrath, and used it to take hold of the freighter and drive the entire ship toward the ground. He grunted with the effort, his respirator increasing his rate of breathing to account for the exertion.
The ship, its damaged engines unable to compensate enough against the downward push of Vader's power, went nose-down and streaked into the ground. Vader imagined the screams of the pilots as they watched the forest race toward them. The ship disappeared behind the tree line and exploded into a fireball that reached above the forest's canopy and caused the ground to vibrate. A cloud of black smoke rose into the darkening sky. A second boom sounded behind him, his Master having driven the second ship into the ground the same way. The forest went silent for a moment in the wake of the explosions, with only Vader's breathing to disrupt the quiet, before the howls and chirps and squeals of Ryloth's fauna returned. Vader, his Master, and the two Royal Guards stood untouched amid the smoking craters of blasterfire that pockmarked the terrain. The Royal Guards gazed at Vader, at his Master, and Vader imagined the looks of wonder they must have under their helmets. They knew the Emperor had power, though Vader doubted they'd ever seen it so nakedly displayed.
-- Lords Of The Sith
Worth noting that ship could hold almost twice as many people as the ship TCW Maul dragged off a cliff.
There's also this:
He fell deeply into the Force and loosed a wave of power from his outstretched hand that filled the circumference of the tunnel. The blast slammed into the charging horde, cracking exoskeletons, shattering stalagmites, and driving a score or more of the lyleks in the lead backward in a shower of broken bodies and broken stone. They squealed and chittered and flailed, and the lyleks following after scrambled over the fallen and wounded, their eyes fixed on Vader.-- Lords Of The Sith
Lileks have lightsaber resistant armor.
This is bullshit though:
He was also implied to be her superior both in the episode and on starwars.comp
Even if we take a quote that doesn't reference Maul's combat abilities to refer to Maul's combat abilities, Malchor's a nexus:
question: "can you explain/justify/defend the inquisitors being able to fly on their spinning lightsabers"Henry Gilroy: "There's an A answer and there's a B answer. The A answer is usually my go to easiest answer which is that you have to ask Dave Filoni. The B answer I would say is a longer mythological discussion and it relates specifically to Malachor, and how it is the home of this Sith Temple."
If it isn't obvious already, the previous episode shows us temples aid force users of the appropriate alignment:
The Jedi temple Kanan brings Ezra to is located in Lothal's highlands. The energy of the Force radiates from the central temple spire. Ezra listens to the secrets of the ruins as he presses his hands upon the icy stone. He senses that the temple will allow both him and Kanan to enter.Star Wars Rebels: Visual Guide: Epic Battles
And there's this, which, unlike your sw,com quote, directly references Ahsoka's combat abilities:
"We used to have this problem in Clone Wars when we would try to put Yoda in a story and it would be like, “Yeah, if Yoda’s there, this isn’t really a problem is it?” That’s because Yoda’s going to go in there and kick everyone’s butt. We all felt that Ahsoka, the only person that could really match her in this time period, blow for blow, would be Vader or the Emperor."Feloni, http://www.starwars.com/news/dave-filoni-interview-star-wars-rebels-season-two-part-1