Slitherine

If you have 2 four bases LH units, both disrupted, shooting at the same target, ¿do you count all the dice (4), and then take out one in three because of the disruption? (therefore having 3 dice); or you take out the dice unit by unit, so you end up having 4 dice?

take one off

In the combat mechanism section it specifically says how to calculate dice.

That is where Phil is steering you the right direction.