How would Ghazzy ever land a single hit on Sun-Jae?
Since the possible abilities/stats aren't restricted, Sun-jae's perception is
0.016 Seconds.
Since there is no perception speed mentioned for Ghazzy it's perception will be classified as superhuman (0.08 - 0.0291 seconds).
This gives Sun-jae a best case 5x advantage that lets his see Ghazzy's attacks in slow-motion.
Worst case, a 1.8x advantage which gives him a minor reaction advantage.
On top of this, Sun-jae's ANPR scales above the old representatives who can predict the movements of Dowan using boosters (someone 5x faster) well enough to be able to catch him.
How will Ghazzy land a hit on someone with that level of ANPR + a reaction speed advantage?
Then there is intelligence, Ghazzy is Above Average while Sun-Jae is at least Gifted.
(Note: Sun-jae's gifted rating is a bit outdated. His should scale to if not above Extraordinary Body Dowan who is a Combat Genius.)
This intelligence disadvantage makes it even harder (if not impossible) to overcome Sun-jae's ANPR and land a hit.
Now let's talk about the
Speed Technique.
When using an inferior copy of Sun-jae's speed technique Se-Hee was able to perception blitz EB Dowan who is faster than him.
Sun-jae can spam this technique with no drawbacks, making it even easier to hit Ghazzy while easily didging his attacks
The technique also might be comparabe to Dowan's Boosters skill which is a 5x speed multiplier (There isn't much evidance for this yet tho).
If Sun-jae somehow slips up and is about to get hit he can redirect Ghazzy's attacks.
How this works is Sun-jae activates his speed technique and then pushes his opponent's attack into another direction, something that uses his LS not AP. We know this is the case because when he
used this move against the traitors, their arms would have shattered and fight would have been over right there (Sun-jae scales so much higher he one shots all of then in this fight).
He is skilled enough to pull this technique off against 4 people at once so he can easily do it against a single opponent.
With Ghazzy's 2,261.22x LS disadvantage he can not overpower Sun-jae and so can not resist his attacks from getting redirected.
Also, Sun-jae scles
WAY above the Class M feat.
This feat was done by Post-Dragon's Nest Dowan who is upscaled by Challenger Tower Dowan.
Challenger Tower Dowan is massively upscaled by Extraordinary Body Dowan.
Sun-jae overpowered Extraordinary Body Dowan with
one finger.
From what I'm seeing, Sun-jae is too fast and smart to get hit while being strong enough to rip Ghazzy to pieces with his LS.
This is how I see the fight going (The car parts are Ghazzy's flesh sun-jay ripping apart by the second until there is nothing left

)