This is a very skillfull power sweep setup
Max Iv on attack and speed ( minor on health )
- shiny * with a good name because it's badass, Dark Knight
Item : Galladite
Nature : Mainly something which can boost attack ( not spA )
Focus punch ,
You ( if possible ) predict and use substitute after the enemy has used a stat boost move ect . Or have hit you .
Then thunder-wave and paralyse them making you faster and having a higher chance of landing a focus punch which you will have STAB on top .
This will hit dealing massive damage as rather your sub or paralyse helped land the hit repeat this and most likely sweep upto 3 - 4 of the enemy team in a second.