I'm really liking NU so far, I'm currently rank 50 or so
What I'm seeing a lot of :
Magmortor
Swellow
Braivary
KlinkKlang
Sawk
Miltank
Tangela
SlowKing
Magmorter hits like a truck most of the team members I've tried out bar Slowking haven't been able to switch into it very well and few have the staying power or speed to take it down, especially if it runs Hidden Power Grass. Generally it needs to be revenge killed.
Swellow and Braivary are two powerful birds, I've found Magneton or Scarf Sawk to be very effective against the two, mixed results using Intimidate Tarous due to the dominance of U-turn on their standard sort of sets. Magneton resists U-turn , Brave Bird and Facade on Swellow but does have to watch out for Super Power on Braivary.
Klinkklang was just wrecking me when I first started playing the tier but it seems it's actually quite easily defeated if you can catch it before to many boosts. I suspect this is the reason I've been seeing the occasional Probopass since it can take Gear Grind and Return very well and well KlinkKlang doesn't have much options for the thrid slot, I've seen Sub and Toxic thrown on but not much else. I'm been using Magneton to deal with it, trapping , subbing and dealing damage with either Thunderbolt of HP-Ground depending on the moveset I've gone for.
Sawk is a decent guy for this tier. Most often I see a scarf set since it can hit non-scarf birds with Stone-edge and take them down but life-orb and even leftovers have been spotted. Sturdy trolls me so hard especially in my harzardless team at the moment.
Miltank , Tangela and Slowking seem to favourite walls. Miltank happens to both have self recovery and Heal Beal which can just ruin any attempt at statusing their team. I've dealt with it in a few ways mainly Sawk and Magmorter who can use Close Combat and Focus Blast to punch some holes in the cow. Tangela and Slowking seems to almost always be used together, probably to have a regenerator core. The wall opposite ends of the spectrum effectively so they can be quite hard to get through especially with Tangela's sleep powder. One interesting way of getting around this I've had is Shiftry who not only isn't effected by Leech Seed , has early bird to troll sleep powder with, Tangela can't do a thing to it even with it's frail defenses while Slowking can hope for A : a burn off Scald B: Hitting with Flamethrower but thanks to Sub and SuckerPunch / Being faster with Seed Bomb it can't do that much anyway.
Ocassionly :
Lanturn
Camerupt
Girafarig
Grumpig
Tauros
Magneton
Probopass
Lanturn was a pain in the ass for one of my teams, since most aren't running air balloon at the moment hidden power - ground on Magneton seems to my favourite way to take it down.
God, I was completely unprepared for Camperupt earlier today. It has Fire Blast and Earth Power which were able to take down two of heavy hitters of my teams in quick succession. Again Hidden Power - Ground on Magneton and getting something with Earthquake in unharmed seems to deal with it well.
Girafarig and Grumpig seem to function as calm minders most often. Trying to hit Girafarig with Shadow Ball is embrassing but both are ultimately stopped by Unaware Pokémon such as Quasire or Swoobat both of which have their merits. I've also had a bit of success out gunning it with thanks to Tail Glow Volbeat which can pass to a myraid of Special Attackers in the Tier.
You'll see I've mentioned Magneton quite a bit and it's because it is just great in the tier. The choice of Hidden Power seems to be most important choice I've tried out Ground , Grass and Fire each of which leaves you walled by some fairly common pokémon. Fire is ultimately only used for Tangela and was ditched fairly early on for Ground / Grass . Grass deals with Rydon and Quaggy easily but Ground hits Klinkklang , Magmorter , Sawk , Rydon and most importantly other Magneton. I've been running sub for protection from paralysis / leech seed / sleep which lets me deal with Magmorter / Sawk a lot better. Probopass seems to be used either as a lead with Taunt / Stealth Rock to get things going or to trap Klinkklang and just sit their and wear it down with Earth Power.
Hail also seems to be used a fair bit but is stopped short by the steel and fire types in the tier. In particular Magneton who can not only resist Blizzard spam but hit stuff with HP - Fire / Hp-Fighting / Flash Cannon and Stallrein with a Thunderbolt. Klinkklang after a boost or too runs through an entire team with Gear Grind going right through Stallrein's subs.
I've just been playing another match and noticed Shedninja is down here and is really bad to play against if you ( like me) don't have hazard and run few Super Effective moves.
I tried out a Cacturne with (Swords Dance , Spikes , Seed Bomb , Sucker Punch) but it was quite underwhleming. Sure spikes were nice when they got up and the occasional revenge kill with Sucker Punch was great. Thanks to Water Absorb it worked great at countering Lanturn and Quaggy but I ultimately switched it over to Shiftry who have been preforming much better.