Happy to help. The first thing you need to do is find out if the SEO done to your site could also be the reason why your site dropped. Even with the EMD update, to drop from #8 to #96 there must be something else going on.
Ask yourself these questions:
Is the content on your site over-optimised?
Does your link profile look unnatural (exact keyword anchor text, low quality links, article directories, blog comments, link wheels, etc.) ?
Could you have any on-page issues (duplicate content, over-optimised meta, etc.)?
If you show us your sites we will be able to give you better advice.