Sylveon @ Life Orb  
Ability: Pixilate  
EVs: 248 HP / 252 Def / 8 SpA  
Bold Nature  
IVs: 0 Atk  
- Hyper Voice  
- Yawn  
- Protect  
- Fake Tears 
if youre one attack + 3 set ups, run Life orb

Corviknight @ Sitrus Berry  
Ability: Pressure / Mirror Armor  
EVs: 248 HP / 100 Def / 8 SpD / 152 Spe  
Impish Nature  
- Iron Defense  
- Roost  
- Taunt  
- Iron Head // STEEL WING // FLY // DRILL PECK
Pressure stall should not be running flinch moves especially if you're running speed. Fly is another turn of protect, Drill Peck has the damage of Iron Head without the hax working against you.
For all corv's, for pure damage with +6 def: Body Press, Power trip, Steel Wing, Drill Peck. Fly is for stall, and Steel Wing will help boost def even when taunted + crazy high PP for mirror matches.

Incineroar @ Chople Berry / Life Orb
Ability: Intimidate  
EVs: 48 HP / 252 Def / 208 Spe  
Impish Nature  
- Flare Blitz  
- Will-O-Wisp  
- Bulk Up // SWORDS DANCE  
- Flame Charge / Close Combat / Taunt / Darkest Lariat // SUPERPOWER
(there are two sets on the Comp that are only an item change, so fixed that) 
Not verified, but you have enough defense investment with intimidate and will-o to switch to swords dance.
Superpower + attack boost cancel each other out and save you extra spdef. optional only on boosting sets.
Excadrill @ Choice Scarf  
Ability: Mold Breaker  
EVs: 232 Atk / 36 SpD / 240 Spe  
Jolly Nature  
- Earthquake  
- Iron Head  
- Fling  
- Swords Dance
This set was 252+ speed, but since only excadrill has base 88 speed, this can be lowered to 240 and raising the 220 atk to 232.

Excadrill @ Life Orb  
Ability: Mold Breaker  
EVs: 224 Atk / 36 SpD / 248 Spe  
Adamant Nature  
- Substitute  
- Earthquake  
- Iron Head  
- Swords Dance
Same news as the set above, but you only save 4 evs to outspeed 252+ base 75's like dracovish.

Excadrill @ Choice Band  
Ability: Mold Breaker  
EVs: 220 Atk / 36 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Iron Head  
- Poison Jab / Fling
- X-Scissor / Swords Dance

Excadrill @ Life Orb  
Ability: Mold Breaker  
EVs: 228 Atk / 36 SpD / 244 Spe  
Jolly Nature  
- Substitute  
- Earthquake  
- Iron Head  
- Swords Dance
More of the same unique speed tier situation, this outspeeds 252 base 100's

Haxorus @ Life Orb  
Ability: Mold Breaker  
EVs: 28 HP / 176 Atk / 52 SpD / 252 Spe  // EVS: 32 HP / 176 ATK / 52 SPD / 248 SPE  
Jolly Nature  
- Outrage  
- Taunt  
- Earthquake  
- Iron Tail / Swords Dance / Close Combat  
While most Haxorus's run 252/252 sets, this one looks like it was calc'd to tank something. This has the same issue as excadrill BUT hax is far more common and more likely to be a simple 252/252 set. You only get 4 speed evs before running into 0 speed Dragapult or 8 evs before running into max speed 95's like kyurem or Darmanitan G.
I put the 4 evs into HP taking you from 300hp to 301 meaning it takes an extra seismic toss before fainting. You're welcome to put it back into attack. 

Snorlax @ Chople Berry  
Ability: Thick Fat  
EVs: 228 HP / 252 Def / 28 SpD  
Careful / Calm Nature  
- Counter  
- Amnesia  
- Rest  
- Heavy Slam / Defense Curl / Charm // DARKEST LARIAT // CRUNCH
If you are going to be running Heavy slam for pure damage, Darkest Lariat helps counter opposing stall, and crunch hits with a chance to build momentum getting you around 3-4 defense drops. Heavy slam should be for really fairy/ whim weak teams.

Milotic @ Flame Orb  
Ability: Marvel Scale  
EVs: 248 HP / 252 Def / 8 SpA  
Bold Nature / Calm Nature
IVs: 0 Atk  
- Recover // REST
- Mirror Coat  
- Scald  
- Haze 
Replaced the 252 HP with 248 so you save hp from chip damage. moved the 4 spdef and 4 hp into SpA instead so that all of your scalds will do more in a stall match, and that mirror coat can do even more with the lower spdef. You can put the 8 back into spdef or split with spa.

Diggersby @ Choice Scarf  
Ability: Huge Power  
EVs: 16 HP / 252 Atk / 8 SpD / 232 Spe  
Adamant Nature  
- Earthquake  
- Giga Impact  
- Fire Punch  
- Gunk Shot
Scarf unique speed, lowered to outpace scarf fast 75's and put the rest in bulk.

Diggersby @ Choice Band  
Ability: Huge Power  
EVs: 8 HP / 252 Atk / 8 SpD / 240 Spe  
Adamant Nature  
- Earthquake  
- Giga Impact  
- Bulldoze  
- Fire Punch
Unique speed tier, so slowed it to outpace Sir Fetched and put the rest into bulk. You can use 16 HP evs until download users comeback.

Celebi @ Choice Scarf  
Ability: Natural Cure  
EVs: 16 HP / 252 Def / 240 Spe  
Bold Nature  
IVs: 0 Atk  
- Trick  
- Calm Mind  
- Synthesis  
- Psychic / Energy Ball // LEAF STORM
You have Spa boosting moves that can fix your Leaf Storm Drops. Two leaf storms > Two energy balls without a drop even with +1 spa. Great for getting the battle done faster. 

Vaporeon @ Wise Glasses // MENTAL HERB // SAFETY GOGGLES // LEFTOVERS
Ability: Water Absorb  
EVs: 132 HP / 204 Def / 172 SpA  
Bold Nature  
IVs: 0 Atk  
- Yawn  
- Protect  
- Surf  
- Ice Beam
Safety goggles helps with your sleep/ seeds matchups, Mental herb helps with landing yawn. 10% isn't enough to cut it so Mystic Water/ Never Melt Ice can be used to boost power but check which one your team mates need boosted. Zoom Lens + Hydro Pump & Blizzard can get you the damage without sacrificing HP like Life Orb would. 
Eiscue @ Leftovers  
Ability: Ice Face  
EVs: 40 HP / 152 Def / 96 SpA / 220 Spe
Timid Nature  
IVs: 0 Atk
- Hail  
- Substitute  
- Protect  
- Blizzard
Speed Adjusted to outspeed 252 Dragapult when in No Ice mode. Hp was bumped up to 301, then the rest is in SpA