You may need to hide some pages in wp-admin from specific admin, editor or author. Easily you can do this with following snippet....
To increase conversion rate and SEO rank, you must make your website faster....
Infusionsoft/Keap is really powerful email marketing tool. Also you can get more plugins in Infusionsoft, but most are expensive....
I know you are worried about security level of wordpress website. Please keep in mind WordPress is secure itselft....
