I wouldn't use Force. You would have to let one of the others masterys
away:Without fire: you loose alot of power, strongest imbue and Mag. Defense.
Without Light: You loose speed and importan mag. attack buff(Force series)+strong nukes.
Without Ice: You loose important phys. defense due to guard series.
Without Bicheon: Important Blockrate and knock downs( Will save you more than once in pvp

)
But if you'd like to persist on using Force i would recommend you Bicheon/Ice/Light/Force as a build, because the fire mastery is the less important one for a nuker. You may use the ice and light nukes then. But remember: You'll get a loss of Power!