The character has learned to carry one attack through to the next, reducing attack speed (animation time) by a factor of 0.7 (30%). This attack speed increase corresponds to a damage per second increase of 42% (1/0.7=1.428 rounded down).
Stamina regeneration in combat is reduced by 2.0 (leading to stamina drain, if the resulting stamina regeneration rate is less than 0). The ability will deactivate if stamina reaches 0.
Momentum and Dual Striking can be used simultaneously. Dual Striking needs to be reactivated each time you enter a new zone, even if it seems active, to work properly.
Momentum does not increase movement speed.
There is a bug in core h.nss resulting in the loss of any attack speed bonus if the speed modifier is higher than 0.5. Activating Haste + Momentum corresponds to a speed modifier of 0.55, resulting in the loss of the speed bonus. Activating Haste + Momentum + Precise Striking results in a valid speed modifier of 0.45.