Farming for resonate stems is not very efficient. They aren't in E.P., area chests, etc. The RNG of the frequencies created is extremely unbalanced and forces you to endlessly farm the stems, The rare chance you get a braytech schematic, or a node you haven't opened before makes the new Seal in forsaken painfully boring. Days of farming and at most 1 or 2 new nodes and no schematics. RNG of the nodes, the schematic and the weapon you might get from the schematic... it's just very unbalanced for getting the items you actually need.