Heyo, I thought I would share my build for people looking to PvP on stamblade, along with what my favourite alternative build is in case you are newer or feel like you need more sustain. If you have any questions please feel free to ask me I am happy to help.

My Build

Head: Medium Bone Pirate (Impen-Tri Glyph)
Shoulder: Medium Hundings (Impen Stam Glyph)
Body: Heavy Hundings (Well Fitted Tri-Glyph)
Waist: Medium Bone Pirate (Well Fitted Stam Glyph)
Hands: Medium Hundings (Impen Stam Glyph)
Legs: Heavy Hundings (Health Glyph)
Feet: Medium Hundings (Well Fitted Stam Glyph)
Ring: Bone Pirate (Weapon Damage)
Ring: Bone Pirate (Weapon Damage)
Neck: Bone Pirate (Weapon Damage)

2h: Nirnhoned Asylum (Disease Glyph or Poison)
Bow: Infused Master Bow (Berserker Glyph)

If you feel like you lack sustain open world I would suggest trading out Hundings for Shacklebreaker. The most noticeable difference will be lower crit, so I like to use crit potions when I do that setup.

Please let me know if you have questions