Hey this is an interesting tool. I think if you solve the problem of the tedious nature of data entry you would have a very useful app.
An ideal way (apart from an overlay or api from ankama) would be if you could copy and paste the text from the maging window into a box on the website and click a button. Onclick() it can ignore all the useless data and pass the important info on to whatever function is already calculating the sink.
Extra points if copy pasting auto reloads the page with sink and also keeps previous attempts in history until session ends or user clears it.
You can have a very clean interface, you only need a page with a text box to let people copy paste the text from dofus.
I'm impressed by what you have so far, good work.