Sure, here's my advice in a simplified format, for applicants seeking employment opportunities in Zimbabwe, specifically for this Senior Library Assistant position.

Tips for a successful application:

1. Highlight Relevant Qualification and Experience: Since the job demands a National Diploma in Library and Information Science or equivalent, ensure to list this at the top of your qualifications section. Include any other relevant certifications or trainings you've undergone.
2. Emphasise on Experience: Detail your past role(s) where you executed similar duties. Don't just tell, show how you've successfully delivered library services under pressure, maintaining quality.
3. Enhance Soft-Skills Presentation: The role requires excellent interpersonal and communication skills. Give instances from your past jobs in Zimbabwe where you demonstrated these traits.
4. Be Adaptive: Demonstrate your ability to work on shift basis, display flexibility on your CV. It's crucial to prove you can work under changing scenarios.
5. Focus on Transferable Skills: If you lack a direct match with the requirements, outline transferable skills that could be applicable. For instance, administrative experience could be a plus for the Library management system operations part of the job.

Noteworthy Job Listing Areas:

1. Diversity Focus: The explicit encouragement towards female candidates suggests the organisation's commitment to gender diversity. Use this opportunity if you align with this demographic.
2. Application Method: Make sure your application is completed via the required application platform with the necessary attachments.
3. Deadline and Shortlisting: The closing date is 01 December, 2023. After this, only shortlisted applicants will be contacted.
4. Mandatory Police Clearance: This detail could be easily missed, ensure you can provide this if successful.
5. Five Ordinary Level Passes: The organization values a broad-based education. So, even if you meet the main qualification, failing to meet this could lead to disqualification.

Standing Out in the Pool:

1. Customize Application: Show you understand the needs of the job and how your experience makes you the right fit.
2. Demonstrate Problem-solving Ability: Give examples of how you tackled challenges on the job, preferably those related to Library functions.
3. Show Proactiveness: Highlight instances where your initiative added value to your previous job vacancies in Zimbabwe.

Common Ignored Elements:

1. Importance of Soft-Skills: Candidates might focus more on the hard skills like having the Diploma and overlook the importance of soft-skills. An organization values the interaction between its employees and clients.
2. Library Marketing and Awareness These terms suggest the organization values a candidate who can contribute beyond their core library functions, especially towards client awareness.
3. Shift-Based System: In my experience, this may be overlooked, however, it's crucial as it informs the working hours and flexibility required.

Job search in Zimbabwe or recruitment agencies in Zimbabwe could benefit from such a robust parsing and understanding of popular Zimbabwean jobs listings such as this. As a career consultant, attention to nuance is key, which improves one's chances in the saturated markets like vacancies in Zim or ngo jobs in Zimbabwe.