Long story short, I need math formula or algorithm to calculate how much time we waste as a raid group when we play with people sub 90% survivability.
For example if we have most people with 99% survi on some boss progress and 3 people with 89% survi, how will that impact the the actual number of pulls.
This surely can be calculated.
Or maybe even more advanced one to calculate how much are we going to waste on farm bosses because of such people.