Rites of Battle (p. 129, "Becoming a Watch Captain") : "When a character gains the Watch Captain Advanced Specialisation, it is presumed that he is the default choice for the kill-team´s leader, unless an Inqusitor or the Watch Commander is personally taking charge."
So if handled that way a lot of the codex Squad Mode abilities could never be used as they are dependent on the oath, which in turn is dependent on the leaders specialty.
2 suggestions come to mind dealing with this:
- introduce a new oath specifically for the Watch Captain Advanced Specialty ("Oath of Flexibility"). This oath allows the use of all codex squad-mode abilities but gives no additional benefits. A successful Command Test could be required for this to work.
- give the Watch Captain a special ability analog to the Tactical Marine´s "Tactical Expertise" like this: " Tactical Flexibility "": The Watch Captain may use ANY codex Squad Mode ability even those not given by the kill-team´s current oath. Using an ability not given by the current oath requires a successful Hard (-20) Command Test. At Rank 3, the Command Test becomes Challenging (+0). At Rank 7, the Command Test becomes Routine (+20)."
Both of these options could be more difficult / expensive if the cohesion needed to be spent regardless of the command test´s success or the cohesion cost was higher than normal (+1 for example).
How would you handle this?