doing something a character can be challenging or easy depending on what your doing. so instead of doing ...lets say crafting artifice on one character and biochem on another. you should access your legacy page and click on that specific character w/ companions you want to craft, that way we don't have to log back and forth. it should work the same way you access your comps to do a certain crew skill task.
your on your knight character, press the legacy page and click the alt that can craft (should show). click on that character to "begin crafting" (certain piece of selected equipment). low on materials? don't worry click same character to "find materials" (for certain piece of selected equipment). inventory full? send crafted materials in the mail from that character that crafted the items