Regarding the influence of the interaction between empowered incinerate, grimoire of sacrifice, charred remains, and mastery: emberstorm on mastery:
Bare in mind this is the first iteration of simc, but destruction has remained mostly unchanged, and I'm confident from looking at logs its functioning within expected parameters FOR THESE CONDITIONS. Demonic servitude isn't in yet.
With the current design, two of those things hyper inflate the amount of crit available to destruction. Incinerate ends up with +55% crit chance from normal. This increases the ember generation drastically.
Then charred remains comes in with its 300% increase in ember generation, and basically rewrites how we play destruction. It shifts chaos bolt/shadowburn from 30-40% of our damage up to basically double that at 70-85%.