Important Affixes:

Increased Crit Chance: Essential for maintaining high Vigor levels with Ring of the Midnight Sun.
Increased Attack Speed: Improves your overall damage output and triggers your Spirit Hall effects more frequently.
Increased Vigor Generation: Helps maintain a constant flow of Vigor for Diablo 4 Items damage boosts from Rod of Kepeleke.
Gems:

Ruby (for Strength boosts).
Emerald (for Critical Chance).
Sapphire (for Dexterity boosts).
Conclusion
The Quill Volley Spiritborn build in Diablo 4 is one of the most powerful and versatile builds for endgame content, especially with its ability to scale incredibly well in high Torments. With the right combination of skills, Aspects, and gear, this build allows you to deal massive amounts of damage while maintaining survivability and high mobility. Keep an eye on your Vigor management and cooldown reduction, and you’ll be dominating the battlefield in no time.

Runewords & Mercenaries for the Quill Volley Spiritborn Build in Diablo 4
To further enhance your Quill Volley Spiritborn Build, incorporating the right Runewords and Mercenaries is crucial. These additions will optimize your overall damage output, survivability, and utility in high-difficulty content. Here's a breakdown of cheap Diablo IV Items the best Runewords and Mercenaries for this build: