Topic: Weapons with multiple profiles question

[Wonderbadger]

In a unit that has more than one model equipped with weapons that have multiple profiles (like a Space Marine Devastator squad with 2 or more missile launchers), do all the models in the unit have to use the same profile when they shoot?

It's not something that happens frequently, but my gaming group did run into this. In this case, it was a squadron of 2 Eldar Fire Prisms. One was shaken. Could that one fire its prism cannon with the Lance profile (as a snap shot because it was shaken) while the other fired with the focused profile (small blast)? The description of the prism cannon does not say anything about this (same with the Harlequin Prismatic Cannon and the Missile Launcher in the 40k rulebook), whereas in the new Space Marines codex it does specify for the weapons that have multiple profiles (i.e. the whirlwind launcher and the Thunderfire cannon) that all models in the unit have to fire using the same profile.

[Grand Master Lomandalis]

The Whirlwind and Thunderfire are specific examples where the rules state that you must fire the same rounds with everyone in the squad.  No such rule exists that I can find.  Unless there is something specifically for the Fire Prisms like the Whirlwinds, then no, there is not a rule that would require them to fire in a single mode.