The Area frequency is not one that should be used for such broadcasts.
AIP says the Area frequency is to be used for aerodromes not marked on charts.
Don't muddy things by telling people it should not be used, contravening AIP.
There are few such strips and the traffic light to the extent that isolated succinct broadcasts presumably aren't presenting a problem to ATC, but if any do, then there are arrangements in place to publish such strips on charts so then the MULTICOM applies.
If you are near an area frequency boundary,
Make a succinct broadcast on both.
It's not rocket science.