I built one based on shadow damage in the PTR and it absolutely smokes T4 and kills most of the bosses. Granted it is P300, lvl 100 glyphs, mythics and fully masterworked.
Problem is they once again failed to do any basic testing. Every time you port all but 5 die even when not in town. It is also not available in the class unique cache.
I don’t even have access to a pet for gathering in a helltide. I would expect this from a kindergarten class not a AAA game company.