So to summarize this thread:
*AP: 5x difference plus the Drinker having passive damage reduction, attack reflection/a forcefield, and type 2 immortality
*Speed: Equalized but due to the rules of Speed Equalization, the hunter and drinker have equalized combat and reaction speed, but not movement speed, meaning the Hunter would have Normal Human to Athletic Human movement speed while the Drinker would have Supersonic+ to Hypersonic movement speed.
With those out of the way:
*Due to standard battle assumptions the hunter and drinker start at their furthest range apart from each other, which would be 100 meters. Also thanks to standard battle assumptions the Drinker would know what the hunter looks like and the direction he is in, and how far away he is. The Hunter has no ESP or other means of tracking down the Drinker beyond general knowledge, while the Drinker has two dozen ravens at its disposal that it sees and hears everything through, as well as spells such as Arcane Eye (Which grants remote ESP over a wide area) and Detect Thoughts (Lets the Drinker hear the thoughts of everything in a 60 foot radius), meaning the Drinker will effectively have constant tabs on the Hunter the entire fight. On top of this, the Drinker has the spell Dimension Door which would allow it to just teleport to the Hunter directly by thought (it only requires a simple visual or a direction and distance to teleport, all of which it has by default as per SBA).
*The Hunter range spamming would do nothing in this fight other than give away his position, due the Drinker has a passive forcefield that the hunter's firearms cannot bypass (which was agreed on in the thread), the Hunter has a limited amount of ammunition available (Specifically 20 maximum before needing to pull from his own vitality to create more bullets), and due to the location (Central Park by SBA) the Hunter is unlikely to ever have a clear shot with that much range. Leading with something like Blue Elixir or trying to stealth wouldnt work either, both due to Blue Elixir not making the Hunter fully invisible, only transparent but still fully visible to enemies who actively know what he looks like and are actively looking for him, as well as the Drinker's multiple forms of ESP, its massive passive bonus to spotting hidden enemies (A +19 to Spot, which in game terms makes their senses good enough to detect outright invisible enemies), and Gaze working on invisible opponents. With the speed difference between them its unlikely the Hunter would even be able to keep track of the drinker unless it literally just stood still.
*The instant the Drinker has the Hunter in its line of sight the Hunter would be immediately crippled by its passive Horrific Gaze ability, which makes the Hunter unable to do anything other than walk around (It inflicts the Nauseated status, making the Hunter unable to attack, dodge, or use items or thought based abilities, thus nullifying effectively the entirety of the Hunter's arsenal including the use of things like the hunter and bold hunter marks). Coupled with the Drinker's movement speed advantage, this means that as soon as the Hunter is in range of the Gaze, he has zero means of escaping it or fighting back against the drinker as the drinker would be absurdly faster than the Hunter, enough so to keep him in line of sight for as long as it wants. On top of this, the Drinker's standard active ability, Drink Vision, makes it so that the Hunter would be unable to resist the effects of Horrific Gaze entirely.
*The drinker has thought based death manipulation that can bypass the Hunter's resurrection via Finger of Death and can KO him by thinking with Eyebite, and the drinker is absurdly more intelligent than the Hunter at that point in the game (As Lephyr put it: smart and skilled enough to fight an entire party of 4+ players stronger, more skilled, more versatile, and more haxxed than the hunter who also have prep time, prior knowledge, and summons and it can still viably kill all of them'). On top of this, the Drinker is 5x stronger than the Hunter, meaning that even if you want to try to argue that the drinker's instawin abilities arent starting moves it does not matter, once it's in range of the hunter the hunter can do literally nothing to protect himself or escape and they will die in a few attacks.
*As a what if-scenario (assuming the Drinker kills with something that doesnt bypass the Hunter's resurrection or incap him), even with the prior knowledge the Hunter would gain from the fight, there is nothing in his arsenal that can protect him against the Drinker's Gaze attack, which works even through eye concealing equipment, and even summoning allies to assist him wouldnt do much as they would all be just as weak and slow as him and just as susceptible to the Gaze attack, as well as the aformentioned 'can fight a party of adventurers alone and win' point previously stated.
So please, do tell me how this is not a stomp. The arguments for the Hunter winning rely on the Drinker acting entirely out of character, letting its ravens be picked off without doing anything, and standing completely still and letting the Hunter wail on it without defending itself.