I love this setup, but have gone with the ring mix Litany of the Undaunted/Wailing Host and lots of Ancient items to push up the overall damage. In addition I've gone for Akkam's Manacles so that the first enemy hit gets another 422% damage on top of the mix.
I've got the Foote as a Kanai add-on, and using the Sledge of Athskeleng as the main component, St Andrew's Gage for defence, and Broken Promises to ensure I get loads of Critical hits. Shattering Throw works so well, along with Shield Glare to hold them in position, Heaven's Fury to soften them up, and of course Akkaarat's Champion in Prophet mode for the killer blows.
I play this on T10 and am on GR45 too, so not too shabby.