Two non-fishing crafts at 100 would be enough. There are enough crafts that work well together at both over 60 that you shouldn't go much/any further than that. If you plan on doing all crafts able to be 100 in the future, you're just going insane. With the atrocious skill-up rate, most players might barely get the second to 100 when you announce a third.

Two 100 crafts is enough.