We routinely get questions asking for help in writing letters, applications or resumes from scratch and without a specific answerable question. While there is a custom off-topic reason related to reviewing resumes, this is not reflected in the available options in the close menu. I'm assuming that this comment explaining that SE only allows 3 custom close-reasons still holds true.
Given that, what reason should I give for voting to close such a question? Is adding a custom reason, as I did on the question that prompted this meta post, the best practice?
To clarify, I'm only talking about questions such as "I need to write a letter to apply for a position". These will only be useful to the OP and presumably constitute a variation of an advice question. Questions about a specific problem encountered during writing ("How do I best list jobs like X?", "Can I leave position X off my application?", "Should I include an Objectives section on my resume") are perfectly on-topic.