If we were judging tales on its ability to be effective in the ou meta, it would be e rank. However, the support it brings is tremendous enough to make up for it.
I think you contradicted yourself in two sentences. How effective a pokemon is in a metagame also accounts for how much support it can bring to the table. Drought is exactly the reason why Ninetales is ranked so high in the first place. I wasn't advocating Ninetales to move to E rank or anything that drastic. I believed Ninetales should move from A+ to A.
Think about it, half of most sun teams are almost dead weight, between ninetales herself, a bouncer/spinner, and some kind of trapper(although trapper heat ran is awesome). However, these sun teams are still able to be successful as that half of a team has such a huge advantage brought to them. Outside of sun, sawsbuck is nu, yet in the sun it is probably the best revenge killer and a great sweeper. The same can be said for almost any other chlorophyll sweeper, including venusaur. And as a player of weather less balance/ offense, there is nothing more scary than a volcarona in the sun with a free turn of setup, when I realize " oh shit! my scarf keldeo can't revenge it. The benefits of sun are just that greAt
The benefits of any weather is great, sun being no different. Whichever weather being better than the other is arguable, but there's no denying that plenty of pokemon can benefit from the eternal drought Ninetales supplies. Again though... just having a great ability isn't everything.
And that's where the "supportive" movepool ends! Outside of that, Politoed has Protect (which every Pokemon has), Toxic (which every Pokemon has), and Scald! Ninetales has Roar (a faster Perish Song), Will-O-Wisp (Scald with better chances), and commonly caries Sunny Day. Sunny Day can be used when another weather inducer comes in, or even when it's already in, and it's amazingly useful because for the most part, as other weather inducers only switch in to set up their weather. Will-O-Wisp cripples over half the metagame (most of the power comes from physical attackers) and effectively neuters them, including Tyranitar and Hippowdon. Ninetales also has a partner in crime to help it win the weather war in the form of Magma Storm Heatran, something that Politoed doesn't have.
Don't kid yourself. Politoed and Ninetales are both used solely for their weather, but Ninetales defensive typing and speed (to an extent) neuters it a bit. I think Ninetales is fine in A+ Rank, a bit under Politoed.
Politoed and Ninetales are primarily used for their weather, but they can do other things for their team as well. Like what you already said, they can provide support via burn, toxic, phazing, etc. Ninetales isn't complete dead-weight after setting the sun, he can still burn something or phaze. The things they can do outside of setting up weather is partially the reason why Politoed is S-rank and why Ninetales is below. Choice specs Politoed and Choice Scarf Politoed is actually a thing with an OU analysis. Ninetales with a choice item isn't so much. Politoed has greater bulk, greater Sp. atk and arguably a better movepool than Ninetales. Plus what you already said, Politoed's typing isn't bad like Ninetales'.
Out of all the OU weather starters, which one needs the most support? Ninetales. He appreciates spin support the most (due to his SR weakness) and he appreciates trapping support (because he has the least survivability out of the OU weather starters and 1v1 against the weather starters usually means a dead Ninetales). I get that his sun support helps his team out a lot, but again, so does any kind of weather support. The main difference between sun teams and sand teams or rain teams is that sun teams have never been nerfed (or at least I don't recall it being nerfed). The banning of Excadrill and Swift swim + Drizzle and Tornadus-T is a testament of just how powerful sand teams and rain teams were. Sun teams never experienced such a ban because they simply weren't as powerful as the other two weathers. Even now though, sand support and rain support is still nice to have.
Specs Politoed isn't really a threat most of the time, it's drizzzle itself, I actually switch sdef tales INTO hydro pumps, because unlike keld, it's not that strong after being neutered by sun:
252+ SpA Choice Specs Politoed Hydro Pump vs. 252 HP / 232+ SpD Ninetales in sun: 182-216 (52 - 61.71%) -- 95.31% chance to 2HKO
252+ SpA Choice Specs Politoed Hydro Pump vs. 4 HP / 0 SpD Sawsbuck in sun: 84-99 (27.81 - 32.78%) -- guaranteed 4HKO
252+ SpA Choice Specs Politoed Hydro Pump vs. 72 HP / 0 SpD Venusaur in sun: 63-74 (19.74 - 23.19%) -- possible 5HKO
you get the point by now
It's not surprising that water attacks don't do much damage in the sun. For two of those calcs, you even faced Politoed against pokemon that resist his water attacks in the sun. I don't think Ninetales' fire blast in the rain against a politoed will do much damage either.
Politoed's only viable because of drizzle, face it, you can argue all you want but we know why that thing jumped from DPPt NU to BW OU: Drizzle.
Yeah... Ninetales was in NU too until he got drought.
Ninetales has 2 very important things that it brings that it contributes to drought teams: checking volcarona (sdef set) and *fast* WoW (fast support set or sdef set)
Ninetales's Special Defensive set or even it's defensive set from it's analysis (sdef tales isn't on the analysis page qq ;-;) can combat volcarona, probably one of the biggest threats for sun, why? because if sun doesn't get up SR, then +2 volc basically is a win for the foe. Ninetales, Heatran and even Arcanine all check volcarona, making htem all valuable assets, but why waste a another slot on checking volc when you have something that's your weather starter that can check it, this means not only does ninetales support a team with drought, but it also can support it's sun teams with checking volcarona and other threats.
No weather starter is complete dead weight after setting up their respective weather. Politoed too can contribute to his rain team with encore support, a defensive set, or even a choice set (which may overlap with Keldeo's role). The real difference Politoed and Ninetales have (aside from their weather) is that Politoed has better stats tailored for a weather starter. That is... better bulk, better Sp. atk, and slower speed. And Politoed's typing is just flat out better than Ninetales'. Of course, being mono-fire has its advantages, like you said, such as checking Volcarona, but ultimately... mono-water > mono-fire.
All in all, Ninetales bringing the best and most powerful weather in OU should be enough for it to be S, people just like to whine about how SR weakness is the apocalypse honestly(no offense).
Ninetales isn't just weak to SR. He has the least bulk out of the OU weather starters, a poor typing, a shabby move pool, and has the greatest speed (a stat which is detrimental for a weather starter) out of the weather starters. His sun support may be great, but you can't just laugh off all those faults, and Ninetales has a TON of faults.
Sawsbuck, Venusaur, Lilligant and more actually have a purpose in OU due to this thing, and hell are they amazing. Sawsbuck and Venusaur would be A and S respectively if ninetales was S, because lets admit it, when have you not been threatened by those two when a competent player is using them? Seriously, sawsbuck can actually run excadrill's old spread from back when it was OU and make scarfs irrelevant from your opposition, +2 buck HURTS, seriously, (jump kick is what I recommend because baloontran and ferrothorn are bitches :[) even unboosted LO sawsbuck hurts offense pretty hard, OHKOing DD dnite after SR and offensive QD volcarona regularly:
252+ Atk Life Orb Sawsbuck Double-Edge vs. 4 HP / 0 Def Dragonite: 243-289 (75 - 89.19%) -- guaranteed OHKO after Stealth Rock
252+ Atk Life Orb Sawsbuck Double-Edge vs. 4 HP / 0 Def Volcarona: 331-391 (106.08 - 125.32%) -- guaranteed OHKO
Overall, sun is possibly the BEST current weather in OU due to how much different chloromons and fire mons you can abuse while still remaining viable, Sawsbuck and Venusaur absolutely demolish teams, victini and darmanitan break insane amount of walls, volcarona makes OU tremble in the proper conditions, etc.
BUt as long as people like to say "SRSRSRSRSRSR", we will never have S rank ninetales, but hey, I sure as hell will NOT let it drop to A rank
All those pokemon that rely on sun need Ninetales to set it up. Their effectiveness is greatly diminished in rain or sand. Unfortunately for Ninetales, he just so happens to be weak to all of the other OU weather starters' STAB attacks. He also just so happens to have the least bulk out of them. He also just so happens to be THE OU weather starter most vulnerable to hazards. Ninetales will have an extremely hard time winning any weather war on his own, which is why he loves spin support and trapping support. Without that support, Ninetales is unlikely to win any weather war.
Sun is arguably the best weather in OU. Arguably. It's not arguable that Ninetales needs the most support out of the OU weather starters. And sun is only arguably the best weather because Sand and rain teams got nerfed when Excadrill, Tornadus-T, and Drizzle + Swift swim got banned. Even after the ban, rain is still arguably the best weather. Keldeo, an S-rank pokemon, greatly appreciates having his water stab dealing 50% more damage. Plenty of steel type pokemon love reducing their fire weakness under rain. Tentacruel and Toxicroak love the extra healing they get from the rain. Rain is arguably the best weather. It's not arguable that Politoed doesn't need as much support as Ninetales. It's not arguable that Hippo and Tyranitar have a ton more utility than Ninetales after setting up their respective weather. Stoutland and Sandslash can abuse the sand with sand rush if they want to.