You should look into "Aetherial Reduction", considering that your miner and botanist are level 80.

I'd recommend looking for a guide, but the short version: Certain items can only be gathered as collectables with the intention to "atherial reduce" them into Crystals, Clusters and special types of crafting materials (a variety of ather-sands). The nodes for these items are timed and are called "Ephemeral Nodes". Depending on the item, you'll get a different type of crystals, clusters and aether-sand - now that you know what you're looking for, it shouldnt be to difficult to do a bit of research yourself to figure out what nodes you want to hit.

This: https://ffxiv.consolegameswiki.com/wiki/Ephemeral_Nodes might be a good place to start some reading - you can also look up videos on YouTube from people explaining how to cluster farm.