You might have noticed from my signature that I've been trying to finish up XIII before XV comes out.

How much gil is enough before you can finish Cie'th mission 63 to eradicate Adamtortoises? I've heard some people recommend 7-10 million gil, but I can tell they're not efficient with where they're putting it. I am currently at 2.5 million gil, and have 3 Trapezohedrons. When should I stop? The grind is very tedious.

It's even worse because I am currently tying my gil farming with my CP farm. It's a short walk from each other, and it's proving to be extremely efficient, but it is quite taxing. Just a general idea would be nice to know. As of right now, this is the only trophy that endangers me from getting the platinum.