Wanna share with You a picture of the "must have" consumables that are required for my first Raid with a good guild - so much gold even as an alchemist myself :) :
The Best PvE Warrior Tank Build for WoW Classic - Odealo
WoW SoD: Best potions, flasks, and consumables in WoW Classic Season of Discovery - Dot Esports
Feral Druid Tank Consumables Guide - WoW Classic Season of Mastery - Wowhead
WoW SoD Tank Warlock Build with Talents, BiS & Runes
Season of Discovery - World Buffs and Consumables (Wowhead Guide) - YouTube