How much int/wis to get to make a difference on tradeskills?

[jolanar]

Going to be working on tradeskills and going after the Shawl on my Shadowknight. I'm realizing it's surprisingly easy to get a high int on a Shadowknight since quite a few pieces give over 10 int, combined with superior Dark Elf starting stats.

Should I aim get to get as high as possible or is 200 "enough"? Is there any kind of diminishing returns?