In Diablo 3, what should be the primary focus of a Lvl 675 paragon with 100+ hours played?

Been playing D3 since it originally came out, and I’m stuck in a bit of a skill rut. Here’s what my typical session looks like on my necro:

1. grind bounties for essences and NR for fragments
2. grind GRs for gems, XP, shards, legendaries
3. Level up legendary gems to eventually 100~150 and enchant set armor
4. Hope for primal drops
5. Repeat

The cost to buff armor by sacrificing gems is crazy expensive (9 top-tier gems + lvl150 legendary). And I’ve only had one primal drop ever.

I’ve heard at this level paragon is a grind, but am I missing anything, or is this the end-game grind?

Thanks.