I think the main Niche that needs to be focused on with Haxorus compared to the other Dragon dancers: Haxorus is not a set-up sweeper. He is a Wallbreaker who has sweeping potential with the Dragon Dance set (despite that set facing stiff competition). The SD set with Mold Breaker pretty much gives Haxorus the tools he needs to manhandle standard defensive builds and cores. Having trouble with Skarmory or Sableye is an issue, but not one that's impossible to circumvent, since as two common defensive utility mons these two need to be prepared for already, and the pressure Haxorus exerts on their teammates in turn pressures them to come in often.I'm not shooting you down or anything, but I disagree with the fact that Taunt is overrated. This is especially pertinent to the current Landorus-I suspect test going on because some people are saying that Stall and Balance would become too difficult to deal with if Landorus leaves OU. Taunt SD Haxorus is a great counterargument to that statement as it can singlehandedly beat slower, defensive teams all on its own with minimal support--especially thanks to Mold Breaker muscling its way past Unaware Quagsire and Clefable. Here's a set that I used a bit actually in the suspect test ladder:
Haxorus @ Lum Berry
Ability: Mold Breaker
EVs: 120 HP / 252 Atk / 4 Def / 132 Spe
Adamant Nature
- Swords Dance
- Taunt
- Outrage
- Superpower
I don't recommend running that EV spread on any team since it's pretty slow, but one of the teams I was using struggled with Balance and Stall, so I decided it was only necessary to outspeed Jolly Bisharp. Superpower was my coverage move of choice as it can deal with Ferrothorn, Heatran, and Skarmory in just one move. Lum Berry was nice for setting up weak Scalds from stuff like Slowbro, Quagsire, and Alomomola. Plus, Haxorus is strong enough to really make Lum Berry useful:
+2 252+ Atk Mold Breaker Haxorus Outrage vs. 252 HP / 252+ Def Slowbro: 318-375 (80.7 - 95.1%) -- 56.3% chance to OHKO after Stealth Rock
+4 252+ Atk Mold Breaker Haxorus Superpower vs. 252 HP / 252+ Def Skarmory: 268-316 (80.2 - 94.6%) -- 50% chance to OHKO after Stealth Rock
+2 252+ Atk Mold Breaker Haxorus Outrage vs. 252 HP / 252+ Def Quagsire: 378-445 (95.9 - 112.9%) -- guaranteed OHKO after Stealth Rock
That's also why I decided on Outrage over Dragon Claw. If my opponent had a Fairy type in the first place, I wasn't going to set up anyway. About +4 on Skarmory--what usually happened was Stall tended to switch into Skarmory as I set up an SD and then proceeded to Whirlwind which is when you Taunt. Then, as they Brave Bird, you can set up to +4 and then OHKO Skarm.
One last thing: Haxorus excels on Sticky Web teams, which I think was a discussion point on the viability rankings thread. Sticky Web allows Haxorus to run SD vs more offensive teams as it's like going for Dragon Dance, but having its attack boosted by 2 stages (only against opposing grounded Pokemon ofc). In that case, I'd run enough speed to outspeed -1 Timid Mega Sceptile as well as Poison Jab over Taunt to hit Fairies. I think Dragon / Poison / Fighting is perfect coverage, so an unprepared opponent can easily lose half their team to this extremely powerful monster. Plus, one of the most common Choice Scarf Pokemon in the tier, Landorus-T, is outsped by a Jolly Haxorus at +1, so there is some merit to its Dragon Dance set.
Haxorus does not come without its faults, though. Mono Dragon typing leaves it with a pretty mediocre typing for a set-up sweeper, resisting only Water, Grass, and Fire. Grass type moves, espcially in ORAS OU, tend to be pretty weak in the first place while the most popular Water move has a 30% chance to Burn. Resisting Fire is nice, but Fire types are pretty barren in OU and most of them have other moves that can hit Haxorus excruciatingly hard, such as Talonflame's Brave Bird. Unlike Dragonite, Haxorus's ability doesn't grant it an easy Dragon Dance. Unlike M-Altaria, Haxorus has no immunities and has less-than-decent bulk, weighing in at 76/90/70 as opposed to M-Altaria's 75/110/105. It's obvious that Haxorus faces competition from the other notorious Dragons in OU and can really only play an offensive role, whereas the others have quite a few other sets up their sleeves. Zard-X can be bulky wisp, Dragonite can use bulky DD, special, or the parashuffler set, Altaria can be bulky DD or special, Garchomp can be a Tank, SR Lead, SD, or Mixed Mega, and Lati@s has access to Defog. However, Haxorus has something over them, and that is Taunt.
They also have to come into Haxorus almost immediately, since he outspeeds and hits them pretty hard after the SD turn
+2 252+ Atk Mold Breaker Haxorus Outrage vs. 252 HP / 252+ Def Mega Sableye: 291-343 (95.7 - 112.8%) -- 75% chance to OHKO
+2 252+ Atk Mold Breaker Haxorus Outrage vs. 252 HP / 4 Def Skarmory: 175-207 (52.3 - 61.9%) -- 98.8% chance to 2HKO after Leftovers recovery
So SD on their switch turn, Taunt on their response attempt, and then smack them or their switch attempt with +2 Outrage.
Haxorus I think is probably one of the greatest victims (in the OU environment) of 4MSS. Just one more slot to run SD/Taunt/Outrage/Poison Jab/ Superpower||Earthquake would give him basically just the coverage he needs with to be an effective Stallbreaker, or the coverage needed to pull off Dragon Dance with good coverage and Taunt to facilitate set up chances on less offensive members or Suicide Leads for offense, among others.
Also, minor addition for the above. Dragon also offers a resistance to Electric, which lets EQ Haxorus stay in on Rotom-W with a Lum Berry for WoW, for example.