The Nivi drape with a pinned pallu at the shoulder is standard. The pallu should fall from the left shoulder in full. For bridal wear, many traditions involve the seedha pallu pinned across the front so the full pattern faces forward.
A matching brocade blouse in the same fabric as the saree border is the most elegant approach. Many Banarasi sarees come with border fabric for this. Avoid heavy embroidered blouses. The saree carries enough decoration.
Banarasi calls for significant jewellery: gold Kundan, Polki, Jadau, or temple sets. The saree's opulence requires visual weight in accessories. For lighter Georgette or Kora, a single statement piece is sufficient.