I'm not sure if you're joking or you're trying to be serious...
"Vader is wearing something Magneto can control"
Vader can freakin control Magneto himself, regardless of what the magnetic man is wearing. Vader can throw his body around, impale him on metal or non-metal things, mentally reach into his body and crush his organs, snap his neck with a thought, or crush him into a ball. Vader also has the ability to control Magneto's mind and thoughts through mind hax
"Vader doesn't have the hax advantage because Magneto can kill him with his own armor with a thought."
Vader can Force choke him or crush his heart with a thought. Vader can also mentally control the matter of his own armor to prevent it from being destroyed or used against him.
"It doesn't matter what plane of existence Vader draws power from because he's still 5-B. All that flowery shit you're trying to use is a literal non-factor."
Actually its a big factor. Do you not know what hax is? It allows someone to bypass another person's defenses or powers regardless how powerful they are. Magneto can be 10,000 times more powerful than Vader, and the Sith Lord can still reach out with the Force to crush Magneto's brain. Magneto's magnetism CAN'T BLOCK OR OVERRIDE THE FORCE.
For exmaple:
Magneto gathers a planet's worth of metal
Vader, with the help of precog, uses Force choke
Magneto can't defend against the attack
*Magneto suffocates and dies
"Precog acts like the spider-sense. He can't defend against Magneto's own armor."
First of all, this statement makes absolutely no sense and both sentences don't even correlate with one another. Secondly, precog gives Vader a huge advantage by allowing him to act before Magneto has even conducted his attack. You don't realize how many tactical options this gives Vader to pummel Magneto
"Vader's force barrier doesn't stop Magneto's forcefield, and his matter manipualtion has never shown anything on Magneto's potency."
Even if Vader's Force barrier can't completely stop Magneto's magnetism, it can surely diminish its potency/effect. Vader can manipulate many things beyond physical matter, including electricity and magnetism in his environment through the use of the "Kinetite" power. And even if Vader can't gather as much metal as Magneto, he can manipulate things that Magneto can't...he can manipulate ANY matter. That manipulation can control Magneto himself and crush his insides to pulp.
"You really think Magneto's never fought telekinetics before, huh"
Not on the level of Vader's abilities or TK derived from the Force, no.
"and even that's BS since Vader opens with swinging a lightsaber"
Like Vader opens with a lightsaber with every single enemy in every single situation, every single time. You think Vader is a mindless idiot who's only thoughts are "swing my lightsaber all over the place, that will kill them!" ? The guy's pretty smart and he was able to adapt to many tough situations and come out victorious, plus he's got the Force to help him see both the near and distant future. Please take your generalizations and misconceptions somewhere else.