There are several ways to go about making a Sorcerer in Dark Souls: Remastered. Here, we'll focus mostly on using increasing INT and ATT to cast more spells faster.

Here are the stats:

Intelligence: 45
Attunement: 50
Dexterity: 45
Strength: 16
Vitality: 15
Endurance: 15

For this Soul-level 124 build, you'll need enough STR to wield a decent weapon just in case you need to engage in melee combat. However, putting 16 points into Strength will aloow you to wield the Moonlight Greatsword. This sword's damage scales with your INT rating, so it's perfect to have for this build. In your primary hand, you'll want to wield either Logan's Catalyst or the Crystal Catalyst.

On the armor front, you'll want to wear the Crown of Dusk and the Dragoncrest Ringbecause both increase your damage. For light armor, go for the Xanthous Set. For medium armor, equip Havel's Ring and wear either Ornstein's Armor or the Eastern Armor with either the greaves and the leggings of the Xanthous Set or those of the Chain Set. Just be wary that those two cuirasses decrease stamina regen.