It deserves s rank and until you come up with a good counter statement i'm sticking to it
A one trick pony dependent on set up before being good is kinda not S rank imo. I support A/A+ but S is too good for it. I didn't exactly pick obscure mons or sets(mixed Houndoom is very good and while admittedly adamant nature was a mistake it is the same as if I had put lonely which is in fact a set people run.
Durant doesn't seem to be warping the tier. It's just a powerful set up sweeper with a great speed stat that's blind until it sets up. The only walls it can effectively set up on(barring holding a Lum Berry which would change the calcs entirely from a life orb set) are Aromatisse, Bronzong, and Cresselia. 2 walls in the whole tier. want a list of other walls wont let it set up successively and why? Here ya go in alphabetical order every RU viable walling mon
Alomomola-see above scald calcs plus chance to burn
Amoongus-Spore. +1 0- Atk Amoonguss Foul Play vs. 0 HP / 4 Def Durant: 124-147 (48.2 - 57.1%) -- 91.8% chance to 2HKO
Aromatisse-mentioned as one it can
Bronzong-mentioned as one it can
Cobalion-112 Atk Cobalion Close Combat vs. 0 HP / 4 Def Durant: 121-144 (47 - 56%) -- 78.5% chance to 2HKO
Cresselia-mentioned as one it can set up on
Gastrodon-0 SpA Gastrodon Scald vs. 0 HP / 0 SpD Durant: 144-171 (56 - 66.5%) -- guaranteed 2HKO
Golbat-8 Atk Golbat Brave Bird vs. 0 HP / 4 Def Durant: 99-117 (38.5 - 45.5%) -- guaranteed 3HKO
Hitmontop-0 Atk Hitmontop Close Combat vs. 0 HP / 4 Def Durant: 112-133 (43.5 - 51.7%) -- 10.9% chance to 2HKO
Jellicent-0 SpA Jellicent Scald vs. 0 HP / 0 SpD Durant: 135-159 (52.5 - 61.8%) -- guaranteed 2HKO
Registeel-Thunder Wave. Good luck sweeping when paralyzed
Rhyperior-16+ Atk Rhyperior Earthquake vs. 0 HP / 4 Def Durant: 145-172 (56.4 - 66.9%) -- guaranteed 2HKO
Also it can roar you out and that would be rather funny.
Slowking-0 SpA Slowking Scald vs. 0 HP / 0 SpD Durant: 154-183 (59.9 - 71.2%) -- guaranteed 2HKO
Spiritomb-+1 0 Atk Spiritomb Foul Play vs. 0 HP / 4 Def Durant: 186-220 (72.3 - 85.6%) -- guaranteed 2HKO
Also it can Will-O-Wisp.
Note King/others: These are all defensive spreads on relatively common RU walls(I believe I got every logical RU wall by usage listed but if you feel I missed one or some NU-usage wall has real relevance(like Lanturn) then let me know and I will calc for that too happily.
Also notice a common theme? This mon breaks stall wide open. With a lum it can set up on more but loses valuable power. It's an unsightly trade off. Against hyper offense/balance what can ant do? Doesn't seem like very much. it can set up on a few walls. And what else? Not exactly sturdy enough to live any sweepers' specially based hit. And a physical hit is going to cripple it a lot too, no?
Durant has a lot going for doing good damage but is not infallible. It CAN be outsped. With some chip on it before hand I showed in my first post a variety of quality mons can injure it either via outspeed(scarfers werent even calced for) or priority which Durant cant help against. I reiterate
I support wholeheartedly A/A+However a one trick pony(who wants a scarfer/bander who can't even have a reliable move? Scarfers are often fail-safes and it can't even be counted on to hit ANY move barring -laughs- Aerial Ace? A band set has the same concern. And any sub-pass set is just a sub-set of the Hone Claws standard set with just less coverage.) has no place in S-rank imo, especially when it is so unreliable until it sets up and is so frail on half the spectrum of moves.