Another weapon we’re going to be using on Elden Ring Runes offhand is a dagger in your offhand, just so you can use Golden Vow. It just gives you more damage and more defenses. As for your staff of choice going to have the Demi-Human Queen's Staffwhich obviously scales very nicely with strength.

Frost Build Talismans

As for your talisman, have the Great Jar's Arsenalto improve your equipment load. Have the Spear Talisman which improves your counterattack damage being the weapon does piercing damage. Shard of Alexander is here to boost your ash of war damage. Then Millicent's Prosthesiswhich with successive attacks you just do more damage and being that Wide Strikes is nothing but successive attacks.

Frost Build Spells

For your spells, pretty much the exact same ones, not going to buy Elden Ring Items really go into detail. SwiftGlintstone Shard,Magma Shot, Rock Sling, and Glintstone Icecrag.

No. 1 Best Elden Ring 1.08 Frost Weapon

Now the Clayman's Cold Harpoonis a Magic-based spear that does have an intelligence scaling and it can be infused.