Limit of the current simulation for healer?

Here is the setup i’m gonna use:
https://www.askmrrobot.com/wow/simulator/report/766c7b84d6fc48828cb44e4d9a39e94c

I did a bunch of exclusion (all low item corrupted pretty mutch).
We can see i’m very very very cose to the BiB (here).
But i have almost half of the death count… Maybe HPS pure isn’t the solution but death count is too volatile to be use a optimizing function.
What if it was the highest difficulty level compare to the death count ?
Like : this setup can go to this difficulty without having a huge amount of death (10 ?). So this is the best setup you should use in progression ! Or idk. Or i just wait for 9.0 where corruption will not be here xD

Another simulation :
Custom gear with an error margin of 0.1%
BiB with an error margin of 0.1%

That last one made me think about something. What about putting a margin in the setup tab before BiB like 2% over the HPS value. Then be able to select in all the setup viable order by ally death. Maybe having the list like the Tier list you did a while a go. and so we can see and choose what to take ?