Protection Paladin Tank Gems, Enchants, and Consumables — The War Within (11.2.5)

In general, the gearing you will do with gems and enchants will all go in the same direction as the general way of gearing your character for specific stats. You can read more about it in the Stat page linked below.

You should use a Culminating Blasphemite in your first available gem socket, and fill every other with Masterful Emerald.

Use Flask of Alchemical Chaos as a general-use phial.

Algari Mana Oil as Templar or Rite of Sanctification as Lightsmith.

Tempered Potion should be your combat potion of choice.

You should use Invigorating Healing Potion for in-combat healing. Healing potions do not share a cooldown with Healthstones, so you can use both independently if you can access a Warlock.

Use Chippy Tea as your food buff of choice if a Feast is not available.

If a Feast of the Midnight Masquerade / Feast of the Divine Day is available, use this instead.

In addition, if you can afford it, you should use Crystallized Augment Runes to increase your primary stat. Augment Runes are expensive, and disappear on death, so use them wisely!

You can also buy the permanent Ethereal Augment Rune once at Renown 18 with the new Season 3 K'aresh Trust faction or use the Soulgorged Augment Runes that drop from the new raid and persist through death.