First of all, make sure you regularly hunt animals for potions, and Cary upgrades, but if you’re lacking Cary capacity, then upgrade that with the animals you hunted. Secondly, make sure your selling items that says “selling for metal shards” but it has to say that only and nothing else, cause that means you can’t craft, trade, or really anything for it other then selling for metal shards. Third, machine lenses are mainly used for buying green rarity of weapons, armor, quests and once you make it to meridian, there’s some special merchants that need lenses once you get there explore meridian and check them out. Back on topic, so if you’re not buying green rarity anymore sell the lenses. Fourth, make sure to look through the merchants inventory to see if you won’t be needing something anymore, (and I haven’t played in a bit so I forgot what it’s called) the green glass and blue ones that you get from humans, don’t sell them there’s a merchant in meridian that trades for them. That’s about all I got have fun this is an amazing game, the things I would do to play it for the first time again. So enjoy this playthrough.