You can get the potions just east of the Dominic Onion guy. If you do not have enough NMZ points, you can use Prayer Potions instead of Absorption Potions. If you want more AFK, skip the overload potions, as you’ll have to refresh it every 5 minutes. You’ll need a Rock Cake or a Locator Orb, at least a dozen or so doses of the Overload Potion and Absorption potions, so you don’t need prayer/protection prayers. This setup is preferred for people under 92 Hitpoints since Dharoks 1hp setup is better otherwise. This is a guide on setting up Obsidian Armor for Nightmare Zone using melee.