Stability is simply water chemistry. When chemistry is stable, the good guy bacteria populate faster, outdoing the pest types and reducing the “ugly stage” significantly.
ATO without question. This will keep salinity pinned which is essential for stability.
PH, ALK CA will be serviced by the stirrer, need to keep MG levels constant.
Test, test, test, work towards keeping all levels both as close to your salt mix as possible and with as little change as possible.
Tons of surface area via rock and sand.
Nutrient management, whatever things you employ to keep nitrate and phosphate both constant and available in trace amounts for use by corals and other micro-fauna.
I always reccomend a separate controller on heaters, if they fail, can be catastrophic.
It will be great to watch this come together.
We wish you luck!