Healthy raid gear, crafting items, and dungeon drops are all included in the Shadow Priests Best Items list. Shadow Priests' gear hasn't changed much since the release of Classic WoW, but as the game mechanics have changed, so has the way you prioritize stats in endgame raids.
Of course the best weapon choice for Shadow Priests is of course Anathema. While saying you need to defeat endgame bosses like Lord Kazzak and Majordomo Executus to craft the staff takes a lot of time and effort, the rewards you get are huge. And in the choice of accessories, the Shard of the Scale from Onyxia will play an extremely important role in your the Season of Mastery, because raid bosses have higher health in this season, so if you want to defeat it, you will take longer. All in all, having an item like the Shard of the Scale that restores your mana is of great value.
Here are the best item listing options for Burning Crusade Classic Gold Shadow Priests:
Feet: Maleki’s Footwraps (Maleki the Pallid, Stratholme)
Legs: Skyshroud Leggings (Highlord Omokk, Lower Blackrock Spire)
Waist: Sash of Whispered Secrets (Majordomo Executus, Molten Core)
Hands: Felcloth Gloves (Tailoring)
Wrist: Dryad’s Wrist Bindings (Exalted, Silverwing Sentinels/Warsong Outriders)
Finger: Ring of Spell Power (Rare drop from bosses in Molten Core)
Second Finger: Ring of Spell Power (Rare drop from bosses in Molten Core)
Chest: Robe of Winter Night (Tailoring)
Back: Amplifying Cloak (Magister Kalendris, Dire Maul)
Shoulder: Felcloth Shoulders (Tailoring)
Neck: Choker of the Fire Lord (Ragnaros, Molten Core)
Head: Spellweaver’s Turban (General Drakkisath, Upper Blackrock Spire)
Trinket: Briarwood Reed (Jed Runewatcher, WOW TBC Gold Upper Blackrock Spire)
Second Trinket: Shard of the Scale (Onyxia, Onyxia’s Lair)
Main Hand: Anathema (Questline started by Majordomo Executus, Molten Core)
Wand: Skul’s Ghastly Touch (Skul, Stratholme)
Of course, it may take a lot of time for players to successfully collect these items in the game, and some items can only be dropped in difficult game areas. This will make the player have a long collecting journey. MMOWTS is a place dedicated to selling all kinds of TBC Classic Gold and TBC Classic items, if there are any items you want you can buy directly there, their prices are very good and will also keep you in the game in the shortest time possible use them.