After a lot of experimentation with other strings, I turned to these Pyramid heavy gauge flat wounds and I am astounded at how good they sound. They take a week to stretch, then another month before they start to sing. After that they are good for at least two years before fading and still they sound good! Beautiful voice and incredible sustain with an even volume across all six strings, and respond well to drop tuning.
Outstanding handmade strings that feel lovely to the touch, and I no longer use anything else.