Taunt Magmatran is soo hard to deal with for fat teams rn. Pex and Chansey are not safe switch ins because of Magmachip and Taunt to prevent recovery. If you add in Banded TTar you should be able to break all Stallteams with ease.
example:
http://replay.pokemonshowdown.com/gen7oususpecttest-631695613
Also SD Knock Off Mega Scizor is incredibly threatening. Celesteela gets Knocked Off and is very easy to chip without Lefties and Rocks. Toxapex gets trapped by Taunt Magma Tran. Some people still have Shed Shell because Heatran is just that dangerous. Scizor just knocks it off earlygame so you can trap it later with Magma Tran. Opposing Heatran gets Knocked off on switchwhich means it is basicly dead and becomes easier to trap with Banded TTar. Zapdos gets Knocked off and trapped by TTar. You can run Earthquake on last slot to kill a Roosting Physdef Zapdos, attempting to PPstall Stone Edges or just Crunch safely. Choiced Leles are very easy to trap with Bulky TTar. Just sack something and make sure Rocks arent up and Banded TTar can Pursuit safely for huge chipdmg if it stays in or a kill if Lele switches.
252 SpA Choice Specs Tapu Lele Moonblast vs. 104 HP / 4 SpD Tyranitar in Sand: 308-366 (83.9 - 99.7%)
224+ Atk Choice Band Tyranitar Pursuit vs. 0 HP / 0 Def Tapu Lele: 138-163 (49.1 - 58%)
Thus Lele is also very easy to chip for lategame Scizor sweeps.
Once common counters or supergood checks such as Lele, Pex, Celesteela, Heatran are trapped or Knocked Off, all you need is a free SD situation to win.
Specs Keldeo is another behemoth rn with HP Electric and Kokosupport. Toxapex gets cleanly 2HKOed:
252 SpA Choice Specs Keldeo Hidden Power Electric vs. 252 HP / 64 SpD Toxapex in Electric Terrain: 208-246 (68.4 - 80.9%)
You do not even need HP Electric with Taunt Magma Heatran trapping those Toxapexes semireliably. Heatran also reliably weakens Fini for Specs Keldeo. Band TTar esp with bulkinvestment traps Latis and heavily weakens Mega Venusaur with Sandchip and good prediction.
Am I the only one who sees a potential broken playstyle with all those trapping moves making sure you cannot deal with Specs Keldeo and SD Mega Scizor?
Building with Specs Keldeo is easier than eva. Step one have a Koko counter. Step two add Taunt Magma Tran and Banded TTar to trap all counters. Step three have a Bulu counter. GG
Exampleteam: Keldeo, TTar, Heatran, Bulu, Pex, Mega Scizor
Another mon becoming good is CM Twave Clefable. CM+Twave beats Mega Venusaur and opposing Heatran once you paralyize them on the first switch and CM the next time as they switch in to be at +2 before they can attack back. Toxapex gets trapped by Tran. Only annoying things are Mega Scizor and Excadril.
Quite funny to see these ORAS threats becoming more threatening in SM OU without Arena Trap.