Superior Mana Potion

Superior Mana Potion is a potion that restores 900 - 1500 mana.

Source
Superior Mana Potion is crafted by Alchemist with a skill level of 260.

Since introduction of patch 2 the recipe is sold by Kylanna Windwhisper in Feathermoon Stronghold and maybe Algernon in the Undercity.

Superior Mana Potion drops from level 40 - 55 mobs and can be fished from level 40 - 55 zones.