Tier D:

1-2: 1 hours
2-3: 2 hours

Tier C:

1-2: 2 hours
2-3: 4 hours

Tier B:

2-3: 4 hours
3-4: 9 hours

Tier A:

3-4: 8 hours
5-6: 16 hours

Tier S/GT

4-5: 12 hours
5-6: 20 hours