Ive been playing with an 8 hour decreasing timescale, If i wanted a base to be protected for the first 3 hours 100% then 20% less every hour after that until 8 hours is up what would that look like, maybe below?

  "damageScale": {
    "1": 1,
    "2": 1,
    "3": 1,
    "4": 0.8,
    "5": 0.6,
	"6": 0.4,
	"7": 0.2,
	"8": 0.0​

reverse them.. You state what the damage is not the protection
"damageScale": {
    "1": 0,
    "4": 0.2,
    "5": 0.4,
    "6": 0.6,
    "7": 0.8,
    "8": 1
}