You need these unless their functionality is being replaced by something else in hosting.
Backup Buddy – premium
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.
