Unlock recipes by crafting whichever item is available and hasn't been crafted before, the "tech tree" isn't always obvious, what unlocks what isn't written down anywhere as far as i'm aware, and probably because it wouldn't be worth the time.

In case you haven't noticed, the flashfield also deals damage to enemies which are touching it's lightning circle effect around Gunvolt and are untagged, this is the damage the Dilation Reticle description is referring to, this damage doesn't stack with damage from tags, therefore the idea behind the Dilation Reticle is enabling a sort of bootleg melee playstyle.

Lenses

Rings

If you don't know why your EP keeps getting eaten when you get hit even after you stopped using the Prevasion chain, it's because prevasion is actually a feature of most pendants, with varying EP costs, besides the pendants with prevasion disabled, you can also disable it by wearing no pendants.

There are 2 other pendants which disable prevasion, but are not listed here since their descriptions contains spoilers and are also not linked to the normal progression.

Pendants

To increase your chances of getting rare materials, try to get the highest rank you can and every medal, time only matters for the kudos multiplier, also make sure you check every item when you reveal them since not all rare items have a noticeable icon.

Common materials appear on every stage so it's pointless to list them here.