Recipe
Starter caster wand
Recommended method
Greater Essence craft
Transmute to Magic, then Greater Essence of Sorcery guarantees #% increased Spell Damage as you go Rare. Fill the rest with Greater Exalted Orbs.
For the highest tiers here, craft on an item level 80+ base. Lower item levels still work but cap the rolls.
Mid-game plan: this uses Greater-tier currencies/essences for stronger rolls. Switch to Endgame for Perfect-tier (best-in-slot).
Step-by-step
Get the base
Find a Dueling Wand (Wand) at item level 80+ so the best tiers are available.
Quality it first
Use Arcanist's Etcher to bring the Dueling Wand to 20% quality before crafting.
Transmute to Magic
Use a Greater Orb of Transmutation on the white base — it becomes a Magic item (these essences are used on Magic items).
Use Greater Essence of Sorcery
Use Greater Essence of Sorcery on the Magic item — it becomes Rare with a guaranteed #% increased Spell Damage.
Exalt for +# to Level of all Spell Skills
Use a Greater Exalted Orb with an Omen of Dextral Exaltation (suffix only) to add +# to Level of all Spell Skills.
Exalt for #% increased Cast Speed
Use a Greater Exalted Orb with an Omen of Dextral Exaltation (suffix only) to add #% increased Cast Speed.
Divine to perfect
With the right mods on, use Divine Orbs to push their numeric rolls toward maximum.
Path of Exile 2 crafting is partly random. The odds and costs below are realistic estimates to set expectations — your results will vary roll to roll.