Honestly?
If your goal is to be playing an optimal class, this isn’t the season to play wizard.
Wizard is decent at T16 and lower level solo GR speedfarming (like GR90-100), but falls behind in pretty much everything else. It’s a good chunk below the other classes for solo pushing, it falls behind other classes for higher GR solo speedfarming (like 105-110) it doesn’t have a role in either group speed metas or group push metas.
If you’re playing wizard this season, it’s because you love playing wizard. It’s definitely not an optimal class for either solo or group farming or metas. I hate to turn people away from playing wizard, normally I’d never do that. But based on your goals, I don’t think wizard is the right class for you in S21. Next patch is supposed to be a big balance patch, so S22 might bring something much better for wizards.
Just look at the rank 1 clear on the seasonal leaderboards:
Barb: GR135
Crusader: GR131
DH: GR141
Monk: GR130
Necro: GR131
WD: GR139
Wizard: GR124
Sure, class popularity is a bit of a factor in that. DHs are super popular right now, and wizards not very popular. But that leaderboard discrepancy should tell you all you need to know.
Everyone and their uncle is playing Demon Hunter this season because the new DH set is very good for solo speedfarming, solo pushing, and group speedfarming. Barb is also a good all around class, the WW/Rend build is great for solo speedfarming and they always have a spot in group speedfarming and group push meta as zbarb.