Upgrading Weapons (no spoilers please)

[Rocky]

basically from what I found, use all the organic items to boost the exp multiplier to x3, then use the most exp machine stuff you can get a hold of. Most of the weapons max out at like level 25 or so, and the 2nd tier weapons max out in the 60s-70s.

The best thing I did was I went to the Creature Comforts shop and bought a bunch of cheap stuff like the Sturdy Bones and other organic items. It costed me 80gil a piece, so about 8k to max out in the inventory. I then used about 40 of them on the item, which was enough to get me the x3 multilplier. After that, I spent as much money on all the machine items, and saw which one would grant me the most exp out of all of them. That's pretty much how you make the best weapons.

In order to upgrade the weapon after being at max level, you have to use the catalyst item to change it to the next tier. These items can all be bought from the Motherlode and the R&D Depot shops.