I’ve built a number of wheels but there are probably far better wheel builders on here, some thoughts based on past builds…
I’ve had tension loss on my very first couple of builds when I was still learning. Different issues on different builds…. Not enough tension, rogue wrong length spoke (only need one spoke to loosen up and others to follow), not stressing the spokes\wheels enough at the end of the build.
I’ve not had any issues with builds in a long time, I don’t do or use anything unique. But because of my issues with my first couple of builds I always check every spoke is the correct length. Take extra care to stress the spokes near the end of the build. Lube wise I just grease, on both the threads and contact area of the nipple, I’m sure there’s a reason why I should use something else but its worked fine.
Last few builds have required DT Squorx Nipples and Washers, after the initial faff of washers I really liked them as the nipples turned a bit easier when under load, they caused less spoke windup and very minimal stressing required with next to no noises of spokes pinging. Also after a few hundred miles they were still spot on. I did however swap the stock Alloy nips that come with the rims for Brass, not a fan of Alloy nips if I’m honest.