I've never been a huge fan of omnicrafting, so at the moment I have 2 60 crafts. I hop on today and check my red scrip turn-ins and some quick math showed I'd need about 3.5 million gil's worth of materials to cap. I'm sure some days will be cheaper than others, but if that's in any way a benchmark, there's no reasonable way to casually craft and advance anymore, as you'd need to craft pretty hardcore to keep producing that kind of money consistently every week. If you gather instead, you're trading time for money, and at that point, you'd probably have more steady income just from selling the mats to other serious omnicrafters.

But I hate gathering. *sigh*