Less, generally. A cutout like the one on Talia is already a design statement, jewelry should support it, not compete with it.
Body Chains for Waist or Side Cutouts
A body chain draws the eye straight to the cutout instead of pulling focus away with a necklace layered on top.
One Statement Piece, Not Three
Earrings alone are usually enough. Stack a body chain, statement earrings, and a bold necklace at once and you've pulled attention away from the dress that earned it.