First of all good idea. Second:
Bug. Renewed Justice minor trait does not refresh Tome of Justice
I wanted to provide more information on this bug. It does work if you have put the tome away. I believe the tome doesn’t go on cooldown until you have used all the pages. So if you make a kill while the tome is still active and then run out of pages you won’t have it ready to use again. If you use all the pages and then make a kill it will refresh.
Perhaps Firebrand should have a special interaction with this trait, like ’ or refreshes all pages of Tome of Justice when you make a kill’.