Beheeyem @ Choice Specs / Life Orb
Ability: Analytic  
EVs: 212 HP / 252 SpA / 44 Spe  
Modest Nature  
IVs: 0 Atk  
- Psychic  
- Signal Beam  
- Hidden Power Fighting / Hidden Power Ground 
- Trick / Psychock/ Substitute / Thunderbolt
Beheeyem @ Life Orb / Psychium / Colbur Berry
Ability: Analytic  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Psychic / Psyshock
- Signal Beam  
- Shadow Ball  
- Trick Room 
Additional move options: Calm Mind, Hidden Power Fighting, Hidden Power Ground, Disable, Psychcic Terrain, Nasty Plot
Additional Items: Twisted Spoon, Tanga Berry, Buginium
Notes: Trick Room variants can be used on hard Trick Room teams and as a singular sweepers; Substitute + Disable can be ran but, Beheeyem is a far more reliable wallbreaker. 
Both offensive and defensive Nasty Plot can also be ran if a situational fighting switch in is required but, this set is typically outclassed by Musharna and Chimecho due to either raw bulk or utility. Beheeyem can also run either 92 or 164 speed Evs to uninvested base 50s and 60s respectively to minimize damage taken, however this will result in loosing out on Analytic boosts in some cases.