Left Hand Weapon: Commander's Standard

This isn't even required to Elden Ring Runes be upgraded and its special ability gives you a 20% damage buff for 30 seconds.

Seppuku

Use of the Seppuku plus the commander standard for the final piece, this is going to give us the full damage potential, and results in buffing your damage and unlocking that insane boss melting damage completely destroying any boss in Elden Ring or at the very least the high-end ones.

Talismans:

Lord of Blood's Exaltation - We're going to make use of the white mask plus the Lord of Blood's Exaltation talisman for an additional 30% damage for 20 seconds whenever there's bloodlust in our vicinity.

Arrow's Sting Talisman - We can't make an aerocentric build without also including the Arrow's Sting Talisman for that extra 10% damage to arrow damage

Shard of Alexander - A no-brainer for almost any build that makes use of weapon skills, which this one, in particular, does rely on quite a lot

Axe Talisman - It does affect the Rain of best site to buy elden ring items Arrows ash of war since that is considered a charged attack so this buffs it for an extra 10% damage