Even though the warsong mall is very nice.... It doesn't include absolutely everything.
Some work needs to be done to get the most out of Warsong, and that includes making your own consumables. You can do this on your own, or at your own pace... But I use a second account to Slave away at hour or longer jobs while I play in another window.
I made this tool because of it's very useful ability.... Calculate how much of each mat you need to maximize your recipe runs to stock your guild bank. It may seem a bit.... unnecessary, but when you deal with large amounts of consumables you're making, you want a tool like this to get the most out of your time.