Will a schematic ever require different combinations of materials?

If I'm crafting light armor for a mage, I'd much prefer the utility/defense slots to take cloth, as those yield stats and bonuses better befitting a mage For example, metal in a utility slot yield strength or constitution (or a combination of the two). Strength is fairly useless for a mage, and while constitution isn't, it's not as desirable as magic or willpower, which is what cloth in a utility slots yield.

The Warden Battlemage Armor schematic requires 15 cloth (armor slot), 9 metal (utility slot), 9 leather (defense slot), and 1 (optional) masterwork.

This schematic is sold by a vendor in the Dalish Camp in the Exalted Plains. Is this schematic set in stone in the materials it requires? Or, since so much of the other loot in the game is randomly generated, will the vendor ever carry a schematic that requires all cloth instead (or some other combination)?