To rig blend shapes for 3D models fast, use pre-made resources, batch tools, and auto-rigging plugins to minimize manual work.
Start with pre-made blend shape templates or libraries (compatible with Blender, Maya, ZBrush)—these provide ready-to-use shape keys (e.g., facial expressions, body deformations) you adapt instead of creating from scratch.
Leverage batch editing features like copying shape keys to similar models or adjusting multiple shapes via sliders to speed up refinement.
For standard anatomy (e.g., human faces), try auto-rigging plugins (e.g., Mixamo)—just ensure your model has clean topology first for better compatibility.