>>537866309
These are the most important sand targets. Note that dragonic and opus uncaps are only relevant when you can clear hexa and luci0. So you'll probably focus on uncapping magna summon and new world weapons first. Don't uncap magna summons if you're confident you'll be primal in its element soon.

For sunstones Bubs and Triple Zero are safe targets. Orologia and Yatima after that. Uncapping Arcarum summons to SSR also needs a sunstone, they're all unavoidable core for their on-element fights.