He had Starhawk as part of an alternative elemental-based setup but has since edited it out. From my understanding (feel free to correct me OP or anyone), it's because the flat elemental damage it's based around doesn't scale with your stats; and it basically needs a whole different gear setup to get the most out of it. Whereas more pure-wdm-based weapons will continue to scale with your stats and eventually most likely outclass that setup. Perhaps he'll add it back in once he figures out the optimal setup for it.
I've tried a Starhawk+Rainbow Fury out myself with limited other complementary gear to go with it, and can attest that at least without the whole elemental setup (or most of it), even the Mysteries set outclasses it, so OP's endgame gear setup surely will as well.
Also: Thanks a lot for the guide OP. I started with your old one last season, planned to main something else this season and just wanted to try a melee sorc out before the wipe but it's way too much fun so I stuck with it