Frost Mage DPS Gems, Enchants, and Consumables — Battle for Azeroth (BfA) 8.2.5

You should use Masterful Sea Currant (or the cheaper Masterful Tidal Amethyst) in all sockets.

Keep in mind that you should sim your character to find out which secondary stat is best for your gear. It may change from the suggestions below depending on various factors. Crit is given here as it will be the most beneficial to the majority of Frost Mages.

Potion of Unbridled Fury is the best potion in single target situations. Superior Battle Potion of Intellect should be used in multi-target situations, and Potion of Empowered Proximity in large scale AoE where you are allowed to remain close to the mobs. In practice, Superior Battle Potion of Intellect is likely the better potion to buy as you get to use it in more situations, for about a 2% difference in single target damage.

Greater Flask of Endless Fathoms should be used as your flask of choice.

Healthstones heal for 25% of the user's maximum health. Abyssal Healing Potion does not share a cooldown with Healthstones, and should also be used when extra healing is required.

You should eat from the Famine Evaluator And Snack Table or whichever of the +93 secondary stat foods corresponds to your top secondary stat. The practical difference between them is about 4 DPS, so pick whichever is easiest for you and your raid group to farm or buy.

If you can afford it, you should use Battle-Scarred Augment Runes to increase your primary stat. Since there is a finite amount of these runes available, you should make sure to use them wisely and to stock up on them for when you need them.