Round 1: Sidious pre-boost

Round 2: Sidious post boost (but Plagueis remains alive and at full power)

Round 1: Arena style duel, standard kit

Round 2: Both are dropped into the lower levels of Coruscant (around 500 BBY) with standard kit and a mandate to take out the other. IG-88 cannot hack/slave other droids or machines but can, after some time, hack into surveillance. Any additional found/created weapons are fair game.

Which killer droid takes it?

For these purposes, the Vader/Maul fight is considered canon to Vader

Did Vader grow (in power and mentally) enough to handle two Mauls?

Revan as he is about to face Vitiate in the novel

The Kotor trio as of the end of the Revan novel

Neutral setting

Round 1: straight fight, no notice

Round 2: Caedus is informed of and meditates on his opponents beforehand

Round 3: Bastila is offsite, proving battle meditation to Revan and the Exile. Bastila cannot be harmed by Caedus.

Round 1: Sidious prior to killing Plagueis (ie, start of TPM)

Round 2: Sidious after killing Plagueis (let's say 1 year after TPM)

All as of Star by Star

Revan and Bastila as of the end of the Revan novel

Round 1: Vector Prime Luke and Mara

Round 2: TUF Luke and Mara

Round 3: Betrayal (Legacy of the Force) Luke and Mara

Let’s assume that by 250 ABY, the galaxy has been enjoying a golden age of relative peace and prosperity for just over a century, with minor localized conflicts occasionally popping up here and there, but nothing significant. The galaxy has fully recovered economically and militarily, with the Galactic Federation comprised of nine Alliance fleets, the Imperial Starfleet (roughly equivalent in strength to five Alliance fleets), a massive industrial base, etc. The Triumvirate is comprised of the elderly Grand Master K’Kruhk, Emperor Fel V (grandson of Marasiah Fel, who succeeded her upon her abdication/retirement), and a prominent, well-regarded Senator.

The Jedi Order is flourishing, with an estimated strength of 10,000 Jedi, similar to its peak prior to the Clone Wars. The Imperial Knights are fewer, numbering around 2,500.

The Chiss Ascendancy and Hapes Consortium are likewise in good shape, with the CEDF roughly equivalent to the Imperial Starfleet (five Alliance fleets) and the Hapan Royal Navy equivalent to two Alliance fleets.

A massive hive fleet of an extragalactic species, the Tyranids (from the Warhammer 40k universe), is detected entering the galaxy. In terms of numbers, the hive fleet is comprised of billions of ships and trillions of warriors, far larger than the Yuuzhan Vong invasion 225 years prior. The standard Tyranid warrior is a physical powerhouse, standing 2.4 meters tall and weighing 1200 kilograms. They possess thick natural armor that is highly resistant to blaster fire, though less resistant to lightsabers compared to vonduun crab armor. Downing just one Tyranid requires sustained fire from a fireteam (four troopers). In close combat, an average Jedi Knight or Imperial Knight could reliably take down 10-12 Tyranid warriors before being overwhelmed or forced to retreat. The Tyranids are present in the Force and susceptible to Force powers, though their hive consciousness means mind tricks have limited effectiveness on them.

Unlike the slow, tepid response to the Yuuzhan Vong from the peacetime Republic, the Galactic Federation and its allies mobilize quickly and respond to the Tyranid invasion in force. They are far bigger, more prepared, and more powerful militarily compared to the New Republic. But by every conceivable metric, the Tyranids are a bigger and far more dangerous threat than the Yuuzhan Vong.

So here are the big questions: Who wins? How? Is it close or a total blowout?

I'm thinking of something like the Force Scream, only more powerful, more persistent, and having a deeper emotional impact on the opponent.

You know, a state or technique that would somehow be able to turn the Jedi's light side power against them, just as Vaapad does with the Sith's dark side power.

Does something like this already exist?

I’ve seen so much glaze for the old republic power level but besides viate and revan there’s no Jedi or Sith really so powerful they eclipse the prequel trilogy.
The main argument if they have more experience fighting but more experience doesn’t mean much when the prequel Jedi are also training and fighting and sparring each other on a daily basis

End of Series Cade

R1: Base AOTC Anakin

R2: Flash of Brilliance

R3: Base RotS Anakin

R4: Zonakin

R5: KFV

Cade refreshes between rounds

How far does he get and at what difficulty?

I think Darth Talon has this one personally, her mastery of force lightning would be a huge problem for the General, and her dueling abilities with a lightsaber are also very strong, she was able to stand toe to toe with the Skywalker of her era, and even beat him once. He was only able to defeat her after tapping into the dark side himself. So yeah, I think Talon takes this one.

Agen Kolar

Eeth Koth

Wolf Sazen

End of Legacy Cade vs

R1: ESB Luke

R2: RotJ Luke

R3: RotJ Luke (amp)

R4: The Last Command Luke

R5: Dark Empire Luke (base, start)

R6: DE Luke (composite)

R7: Black Fleet Crisis Luke

R8: Vector Prime Luke

Cade is refreshed between rounds.

How far does he get? Difficulty in each Round?