When you reverse engineer a green recipe item, you MAY get a blue recipe, which needs fire node. When you reverse engineer a blue recipe item you MAY get a purple recipe that requires wind crystals to make. Blue is better than green and has the same level requirement. Purple is even better with same level requirements. I am still doing low level crafting (level 83 Arifice) so there is most likely more higher tiers that require other special items to craft blue and purple items.