Yea a big thing is that as some people have said, use Benediction whenever it's necessary. It's only 15 min recast, the enmity isn't insta-death like in 11, and it's only useful if you actually use it.

For Aurum Vale I've been using it at the tail end of the first room (the one we go through without fruits) as we have a lot of enemies and once everyone dips around 50% its best to use it then because by that point just straight healing is pretty much impossible. Once me and other WHMs started getting more confident with our benediction usage the runs became infinitely smoother.