Used
this mono choice item team for ~90% of my run. Partially a meme team, but it actually puts in a lot of work - your positioning just has to really be spot-on. Tusk set can honestly be anything (Regen, Water Absorb, TC, etc.); I just got incredibly sick of Iron Moth and Cinderace. Three of four of my Ls were from me switching teams and losing to Beads of Ruin Palkia-O-lite three times in a row on Monday.
Not sure what I'll vote. Leaning very slightly ban. I don't really mind Ghold's defensive flexibility that much. The set that pushes Ghold into suspect/ban territory for me is MGLO. Nigh impossible to switch into; outdamages most if not all Regen-Vest users aside from weird shit like Regen-Vest Chi-Yu. Random Bulletproof Steel resists would be your next best bet. I actually don't think Bulletproof Steel-types are that bad as you also have the bonus of dealing with most Gengar sets and Polteageist sets, but 1) if you have to mention immunity abilities as your most reliable means of dealing with something (see: Gen 8 Blacephalon, Gen 9 Iron Bundle/Walking Wake), it needs to go and 2) I also see Gengar being an issue later on while Dark-types dogwalk Poltea save for those oddball Pixilate sets.
Off the top of my head, I also don't see HOME introducing real defensive answers aside from maybe SpDef Regen Heatran. Only slightly leaning ban since I also never found it that difficult to pressure/threaten an RK against (even with the threat of immunity abilities) compared to Great Tusk and +1/+1 Baxcalibur - two mons that certainly need to go regardless of whether Gholdengo does.