Only if you are going to Expert craft. So if you want to go for the personal achievement crafting, then yes you are better off having the personal achievement crafting tool. If all you are doing is crafting normal items, then you can indeed ignore the existence of Skysteel tools. There is no need to go after it for any other reason than personal achievement. As someone else pointed out in some scenarios, depending on how you melded, your penta-melded tool can actually be better than the skysteel.
