The metal rate calculator gave me the optimal strategy... but it was up to me to implement it. I'm far from a cycles main so this is one of the hardest things I've done in this game. It felt so good to see that 3.333 when I uploaded the solution though. The main instructions inefficiency is the initialization process to get the glyph of purification working. Ideally that element would be closer to the rest of the machine but it was hard enough to get a working layout as it is.