Thundurus (M) @ Life Orb  
Ability: Prankster  
EVs: 252 SpA / 16 SpD / 240 Spe  
Modest Nature  
IVs: 0 Atk  
- Taunt  
- Hidden Power [Ice]  
- Nasty Plot  
- Thunderbolt

Landorus-Therian (M) @ Choice Scarf  
Ability: Intimidate  
EVs: 252 Atk / 60 Def / 196 Spe  
Jolly Nature  
- Stone Edge  
- Hidden Power Ice
- Imprison 
- Filler

Archeops @ Choice Scarf  
Ability: Defeatist  
EVs: 40 HP / 252 Atk / 216 Spe  
Jolly Nature  
- Head Smash  
- Outrage  
- Switcheroo  
- Taunt  

What they do:

Thundurus
    Beats Landorus-Therian/Incarnate
    Beats Celesteela
    Beats Gliscor
    Beats Skarmory
    Beats Altaria

Landorus-Therian
    Beats Rival Landorus-Therians
    Beats Aerodactly/Mega
    Beats Archeops
    Beats Thundurus-Incarnate
    Beats Pidgeot

Archeops
    General meta coverage.
    Beats Articuno
    Beats Moltres
    Should Beat Zapdos