"max . event severity" - does it work ??

[Phoenix-D]

"Event Percent Chance Low := 10%
Event Percent Chance Medium := 20%
Event Percent Chance High := 40%

All too 100%, this will clearly increase and bastardize the Event results ten fold for all the tiered categories and will not prove the result you are attempting to present."

It will prove his point. If you turn Catastrophic events off, they should NEVER occur, even with event frequency set to 100%. These settings, by the way, refer to the chance settings in the game setup, not to the severity of the event itself.