Good news since my last article windows has added support for drive encryption for up to XTS-ARS 256-bit. Provided you are using a Windows 10 machine that is updated past 1511 or later.
Currently there is no way to change the level of encryption for drives that are already encrypted. So you will need to disable bitlocker , set the GPO as written in my previous article and then encrypt the disk.
This version is available from windows update or from the newest MSDN image.
Just be aware of a few things, removable drives will not work on previous versions of Windows 10. And there is currently an issue with SEDs and Bitlocker so steer clear if you are using them.