Using an appliance from stations with two heavy appliances should be on the top of the list for regional composite strike teams. If that is not a smart idea, what is one.
E.g Summertown BWC, Lobethal 34, Stirling 24, Littlehampton 24, Balhannah 34.
Used by crews from ET/Lofty/Heysen/Onka.
With the above, there is still two heavy appliances from either the primary and the nearest back available for each beat.
When it comes to a Light strike team, I guess it goes the otherway around:
Greenhill 14, Carey Gully QRV, Mylor 14, Bradbury 14 with Norton Summit BWC.