What is the best UVW unwrapping lighting method for this particular piece of furniture?....

[anonymous_user_5ab72736]

If you test build with low lightmass settings and preview quality, it’s not going to look great either!!!

I took OP’s original FBX and used a 256x256 lightmap but high quality lightmass settings. Not THAT bad. At 512 it’s pretty much artifacts-free. Add your real material and it shouldn’t be noticeable. Optimize a little bit your lightmap and it’s going to be perfect.
My lightmass settings were, scale .15, bounces 30, quality 4, smoothness 1 (uncompressed lightmap and production quality)

It would be interesting to see each person’s results using different techniques on this model here.