Vervain's ability came with a note that has a demo
video [link], albeit it was rather lacking.
A: Christmas Wolf Berry's party skill damage buff (15%)
B: Shiitake's skill damage buff, magic-restricted (40%)
C: Mizosoba's skill damage buff, magic-restricted (40%)
D: Iwarenge's skill damage self-buff (50%)
E: RM exchange's skill damage FM, magic-restricted, equipped to each unit, with all 5 at max limit break (15% each)
Iwarenge for example gets:
x = [(1 +
A + 0.10)*(1 +
B + 0.10)*(1 +
C + 0.10)*((1 +
D + 0.10)*((1 +
E + 0.10)^5)] - 1
x = [(1 +
0.15 + 0.10)*(1 +
0.40 + 0.10)*(1 +
0.40 + 0.10)*(1 +
0.50 + 0.10)+((1 +
0.15 + 0.10)^5)] – 1
x = [(1 +
0.25)*(1 +
0.50)*(1 +
0.50)*(1.)*(1 +
0.60)*((1 +
0.25)^5)] – 1
x = [(
1.25)*(
1.50)*(
1.50)*(
1.60)*(
1.25^5)] – 1
x = ~13.73 – 1
x = ~12.73
x = 1273%
Removing her self-buff from the equation, the rest of the party gets ~7.58 or 758%.
Vervain's ability makes her very suitable for the 90th floor, although she likely won't have that much of an impact in situations where we're allowed to use crit anyway.