Hey /vp/ I come to you needing help.
I want to build a competitive team, and I thought you guys could help me. So far I have

Bisharp@Leftovers
Ability: Defiant
Nature: Adamant
Evs: 200 Hp / 252 Atk / 52 Spe
Item: Life Orb / Leftovers
Moveset:
Swords Dance / Power Up Punch
Sucker Punch
Iron Head
Knock Off

What else do I need to make a viable team?

Pic not related