Longer ranged weapons in the unit
firing at the same target will increase the potential wound range. This is due to a question in the
BRB FAQ.
As Witchfires are counted as assault weapons, you need to declare a target for the bikers before you start resolving it. Against that target you could cause wounds up to 24", but against the other two units only up to 18".
Q: When making a Shooting attack against a unit, can Wounds from the Wound Pool be allocated to models that were not within range any of the shooting models when To Hit rolls were made (i.e. half the targeted model are in the shooting models’ range, and half are not)? (p15)
A: No.