There are already 2 stickies in there, and to be honest, that third one isn't really big enough to justify a sticky in my oppinion. I believe that the information there could easily be combined with the existing Mage FAQ sticky. So i'm not saying request denied at this point, but could you investigate combining the information first please?
Or have the author of the sticky you want stickied take the information from the Mage faq if it sin't updated anymore, include it in a compilation sticky, and link to the origional sticky giving credit to the origional author.
compilation stickies, provided they are written at least as well as the origional threads they replace, will always be automatically stickied since they cut down on the number of stickies in the forums, freeing up other slots.