I’m grinding most of the professions and have made over 25% progress toward the Level Cap of 80.
So far, the Gil cost is about neutral. I’m mostly grinding using Miner and Botanist. But there are a few items that can only be obtained by Fishing, and those I’ve bought off the Market Place.
Also I’ve run across some examples of how Leve’s are scaled between Battle and Field/ Crafting jobs.