FYI Brass Ring is no longer optimal synth for your level. Patch 1.15 has made doing synth way above your level much more rewarding, you can get upward to 800 SP a synth for something that is ridiculously hard, or average 500 SP for something that is reasonable. I always switch to new recipe once SP dip under 250 SP unless I have no other option, after patch 1.15 I have been grinding CRP from 40-44 using all higher level recipe and I have never had to do more than 150 synths a rank, consider that my SP to next rank for each of my rank would be 3 times yours.
So yea, you're doing it wrong, what are you thinking?
And you're being funny, local leve has NEVER been a source of SP, before the patch it has been waaaaaaaaaay worse. I'm fine with the SP nerf, because after the patch I can actually get free 5k-10k from leve at r47 every reset whereas before it I can get around 3k SP every 5 reset. That's a major 1000% improvement. You have it handed to you easy mode by now honestly, being a goldsmith since CE start I have seen/suffered the worst of worst.