Sam,
I believe the broad archetype is better in this instance, at least unless we could come up with a generic archetype that is sufficiently meaningful especially with regard to ‘Consumption’
It would then still be possible to specialise the ‘other substance’ in the broad archetype e.g. for use in a drug treatment centre. Should maybe add a generic ‘consumption’ and a ‘type of substance’ concept for ‘other substance’.
Sebastian