No crafting class is so-called a better or best gil maker.

It all depends on what is needed on the market at any point in time, and patch cycle. Different parts of the patch cycle will have different needs so you need to know what people wants at the minimum, and if you have the capital, you can make some predictions and pre-purchases/preparations for materials before the actual patch/demand hits.

Those players who had to keep coming to forums to ask "how to make gil?", "which job makes the most gil?", "what is the best 3*/4* rotation?", probably aren't cut to make gil from the market, or have already missed the time to make the gil (since I believe that all worlds are already saturated with crafters).