Worked out by the game's own trait code: the boon's first copy at each rarity, then each Pom of Power level, which adds the same amount whatever the rarity and less each time.
Threshold
Common
Rare
Epic
Heroic
Level 1
40%
40%
40%
40%
Level 2
80%
80%
80%
80%
Level 3
120%
120%
120%
120%
Level 5
200%
200%
200%
200%
Level 10
400%
400%
400%
400%
Each Pom adds 40%, 40%, 40%, 40%, 40%, 40%, 40%, 40%, 40% (levels 2 to 10).
Common
Rare
Epic
Heroic
Threshold at each level and rarity.Show the numbers
Level
Common
Rare
Epic
Heroic
1
40%
40%
40%
40%
2
80%
80%
80%
80%
3
120%
120%
120%
120%
4
160%
160%
160%
160%
5
200%
200%
200%
200%
6
240%
240%
240%
240%
7
280%
280%
280%
280%
8
320%
320%
320%
320%
9
360%
360%
360%
360%
10
400%
400%
400%
400%
Bonus
Common
Rare
Epic
Heroic
Level 1
10%
15%
20%
25%
Level 2
14.5%
19.3%
24%
28.8%
Level 3
17.1%
21.7%
26.3%
30.9%
Level 5
20.4%
24.8%
29.2%
33.6%
Level 10
28%
32%
36%
40%
Each Pom adds 5%, 3%, 2%, 2%, 2%, 2%, 2%, 2%, 2% (levels 2 to 10).
