Just to make a better perspective.
99MNK H2H base dmg: 51
Total dmg from both hands: 250
Total delay before haste/MA: 576
DPS: 26.04
Ukonvasara DPS with AM3: 29.1
Ukonvasara DPS with AM1: 25.2
Obviously just pure "weapons" damage. When you count in MNK's much higher multiattacks, Impetus
than its not even a competition.