Required Plugins

You need these unless their functionality is being replaced by something else in hosting.

Backup Buddy – premium

Google Analytics

Redirection

Schema Creator by Raven

Simple Security Firewall

Spam Free WordPress

WP Super CacheInstrucions

Optimize Database after Deleting Revisions – Go to Settings > Optimize DB and set your revisions to 1 or 2 (or 0) or whatever you want, and check all the boxes (except the log) and set the schedule to weekly. Then save changes. Go to Tools > Optimize DB and run the optimization. Notice table sizes. Are any particularly large? Why? Plugins with logs will bloat database. Delete logs. Turn off logging if not used.

WordPress SEO (by Yoast)