First I'm trying to understand how to calculate 1-shot damage from https://lastepoch.tunklab.com . Lets say I look at Chronomancer Julra, particularly her Frigid Tide spell. Here https://lastepoch.tunklab.com/npc/VoidNagasaBoss we can see it does 700 cold damage, but it doesn't specify a Temporal Sanctum Tier. But it also has an "Added Damage Scaling" like a player spell would have, so is there some known amount of added damage that all monsters get from being a specific level that I can use to calculate how hard T4 Julra Frigid Tide hits for?

The second question I have is about boss ward decay. I know the decay increases over time and the ward amount seems to start at the full health of the boss, but how fast is the ward decay rate? How much does it increase over time, or are those fight dependant?