I would like to know that too. What I've figured out so far: Drahque's LoN Blessed Shield build is heavily group-focused, it lacks survivability for solo. With a few adjustments, one will be able to us it in solo-games, but I don't know how succesful that would be.
Yesterday I put together a suboptimal LoN Blessed Shield to try in a group with a Wiz friend. Had 5 ancient items total with random stats, sometimes quite useless, and didn't have Pain Enhancer at all. We were able to clear GR60 in 8 minutes, which was slow compared to our usual runs, but build was fun and the overall impression was that it should be quite viable in groups. Still that's just my impression. In the end I'd also like to know if someone mains that build and could elaborate on its potential.