Need Wordpress Technical Analysis Expert

Your deliverables will be:
1) Technical audit and analysis
2) Detailed specifications [source code examples] to address discovered issues.
3) Prioritized list of implementing specifications.

Need your guidance in guiding the: a) urgency in which these changes need to be addressed and b) potential lift the website will experience from implementing the recommendation.

1) high desktop & mobile page speed
2) issues in XML sitemaps
3) indexed pagination
4) potential issues from former domain [long since re-directed to new domain]
5) low daily crawls in comparison to # of indexed pages

About you:
--> must have experience in SEO for ecommerce
--> must have experience with very large domains [500k+ URLs]
--> must have deep, technical SEO knowledge