I have a DT Swiss ARC 1400 Dicut 63 rear wheel. It has a Shimano rear derailleur 11 speed LIGHT (ASL11) freehub body and I have an Ultegra 11-28 11-speed cassette. After a few weeks it started to creak under power. Very noticeable uphill. I applied Park Tool Polylube 1000 lubricant to the freehub body and the noise stopped. However, it returns after every 200 miles or so. I'm getting pretty sick of removing the cassette and reapplying the grease every week or so. I ride in good conditions. No rain.
Is Polylube 1000 the best choice? Is there another technique to solving this issue that lasts more than 200 miles?