Patch 7.9 turned out to be a patch that was more impactful than most, but one that also changed surprisingly little for solo queue considering it's a mid-season patch. When 6.9 dropped last year the effects were immediately apparent, as half the cast of champions that got targeted for changes saw their win rates move dramatically, and some champions that hadn't seen the light of day in years, such as Zyra, suddenly came to the forefront. Riot's decision to only rework three champions in 7.9 limited the patches overall effects, and many of the lanes weren't impacted at all.
Still, knowledge is power, and knowing what's hot is invaluable in solo queue. What champions are tearing up the top tables? Let's take a look.
(Note: All stats are pulled from a combination of op.gg's monitoring of the North American and Korean servers. Champions with play rates beneath 2% are excluded as statistical anomalies.)
Top Lane - Pantheon
Patch 7.9 was a mixed bag for Pantheon. On the one hand, the Black Cleaver was nerfed rather severely for his purposes by at patch that also increased the amount of sheer armor that many of his tankier targets have access to. On the other hand, one of his favorite late game items, Guardian Angel, now grants attack damage and is a perfectly reasonably third item for him. Furthermore, patch 7.9 also introduced another bit of pray to the top lane for Pantheon, Sejuani, who gets utterly wrecked by the spear-wielding Spartan Targonian. The constant spear harass that Pantheon is known for ensures that Frost Armor will rarely get a chance to recharge, without which Sejuani struggles to trade profitably in lane.
Be careful when picking Pantheon, however, as he still very much is a champion with a clock on him. While you don't quite need to win the game in 20 minutes like in years past, he still does lose nearly 10% of his stellar win rate if the game makes it to the40-minutee mark. Be aggressive with Grand Skyfall and make sure that you use it to impact the side lanes on cooldown, as that is the true strength of Pantheon, not his endless Spear Harass.
Jungle - Ivern
Did 7.9 include any huge nerfs to Ivern? No? Then it's safe to say that he's still on top. At this point, it's safe to say that Riot has no idea what they want to do about Ivern, as nothing short of taking a shotgun to his kneecaps has seemed to slow him down. The day may soon be coming when Riot decides to do just that and gut the champion, but it hasn't come yet. Until it does, enjoy your free elo, Ivern mains.
Mid Lane - Anivia
While you certainly couldn't tell from the state of NA solo queue, Anivia is actually such a strong champion at the moment that the Korean solo queue metagame has started warping around her. She single-handedly ousted champions like Talon from the mid lane and has been the sole cause of the rise of champions like Zilean, who boasts an impressive win rate against Anivia and little else. That's quite a feat from a champion that's definitely not over tuned, simply strong. Nothing about Anivia is inividually oppressive, but her combination of zone control and heavy damage synergizes so well with other popular champions that it's propelled her to the top. Good luck ever getting to a Draven that has both an Anivia and an Ivern in front of him. Might as well concede on the spot.
Anivia does have weaknesses, however. Champions that are powerful roamers tend to do well against Anivia, who is one of the slowest champions in the league and struggles to make offensive plays in other lanes. Aurelion Sol will easily be able to just maroon Anivia on her turret during her terrible early game and kill her bottom lane over and over again. Secondly, Anivia is horrible when denied her blue buff, so strong early game champions in both the jungle and the mid lane can easily exploit that weakness and bully her jungler to the point where Anivia can't reliably get blue.
ADC - Draven
Draven is in an odd spot on the list, as his extremely high win rate is actually quite artificial. Against the other ADCs that are currently considered strong, he's actually quite miserable and only manages to beat out Ezreal, though he does so quite well. Where he instead thrives is in shutting down the ADCs that people are still playing but shouldn't be, such as Jhin or Xayah. Draven absolutely smashes both of them, but in turn gets crushed by Kog'Maw and Kalista, two champions who have been on the rise for quite some time.
Thus, Draven requires two things to thrive: proficiency with his unique mechanics, as well as the correct enemy champions. In those exact situations, he's a powerhouse pick. In any other, he's far from bad, but likely won't perform much better than a Kog'Maw would. Use at your own risk. Or if you have a nice skin.
Support - Thresh
Thresh is in the unique position of being the support that is both picked the most and wins the most games in which he's picked. The reason is simple. He answers the rest of the bottom lane metagame that has evolved over the last few weeks excellently. He's great against both the annoying harass champions like Nami and Sona, while also having a great game against champions like Blitzcrank that look to prey upon those same squishy mages. Once again Thresh is tasked with being the middle of the road support pick, and he seems to be doing a great job of that. Do take care, however, that you only pick Thresh if you're very confident in your Flay and Death Sentence play. Without his all-in potential, Thresh is a horrible champion in the laning phase, so if you're the kind who misses the majority of your hooks, you best play Sona instead. You won't get anywhere playing Thresh unless you can channel your inner Madlife.