>>31395652Z-Mirror move is fine but if you don't predict well enough and use it on a switch, it's basically just a swords dance that takes up an item slot.
Z-conversion, and any Z-move that raises all stats for that matter, are probably the best Z moves to use.
I wonder how that raising all stats thing is treating Gourgeist, Trevenant, Xerneas, Smeargle and Pyukumuku. Haven't seen anyone using Z-trick-or-tread, Z-forest's curse, Z-geomancy, Z-purify or Z-sketch despite they raise all stats by 1 too. I guess Z-conversion is just that good.
Dunno what the best attacking Z-move would be tho. This anon brings up a very good point
>>31395856