The add on you are looking for, Vindicatu, is
DiscShieldsHelper, but to warn you, I thought this addon would change my life, but in reality, for me, it ended up being clutter. It's just too much information to process quickly
along with everything else you're doing and the information still really doesn't change what spell you're going to cast next in practice. The only information needed there is +/- WS or DA.
The only time it actually changed anything was when I was running through farm content and I wanted to see how much I could cheese a raidwide hit w/ overheal PoHs for big DAs. Because it was farm content, I could take the time to find out which groups I had already mostly maxed out quickly due to RNG crits.
Honestly, VuhDo really gives all the information you need to be the best.