Best practice to update jails

[Jose Amengual]

Hi guys.

I have a dev server for our developers that holds around 40 jails,  
each jail has php, mysql, python etc.

The server is now 7.0 and was wondering what is the best practice to  
maintain security patches and kernel updates and I came out with the  
following idea :

1.- freebsd-update fetch install ( host system)
2.- rebuild kernel ( I have a custom kernel )
3.- ezjail-update -b ( update basejail for all jails )
4.- run in cron portaudit on the jails for thirty party security updates
5.- run portupgrade in case of a security update or for apps upgrade  
on the jails.

I red in some forums that if you run freebsd-update you will need to  
do a portuprade -fa to reinstall all the thirty party apps because  
freebsd-update could upgrade or remove  some libraries linked to that  
programs, is this true ?, will be better to run a cvsup and instead ?

That are some points of my idea but reading on internet I finished  
more confuse about how will be the best way to do this.

any ideas will more appreciate.

Thanks.