Well the best way I’ve found is just killing the taluses, a lot like BOTW. Either look up their locations or get searching, kill a few every blood moon and you’ll be doing fine.

Beyond that, monsters drop way more monster parts in general for this game, sell elixirs. If you do this, be aware that sell price is based on ingredients, not effects, and there’s a money multiplier for more ingredients, so cooking 5 at a time is always better, although you might wanna look online for the most valuable parts. Generally, rarer the better.

Another way is to check your game version and use whatever dupe works for that version, there’s a few, but not everyone wants to do that.