A work colleague and I were discussing this topic a few days ago and I think he may have it the "nail on the head" on how Alliance will get more than 20 hours per week out of the F100.
His suggestion was, Alliance could start a BNE-CNS route and then added CNS - ASP - PER. If they operated this return flight a few days a week it would give them better usage of the F100 plus it would allow the aircraft to return to BNE for maintenance/crew changes etc.
In last Thursdays Courier Mail (15th Aug), Alliance Airlines GM confirmed the Northern Territory "would be considered". So could flights via the NT be the way to go? Maybe Alliance could operate BNE-ASP-PER, BNE-DRW-BME-PER, BNE-TVL-CNS-DRW-BRM-PER, BNE-TVL-CNS-ASP-KGI-PER or BNE-ASP-KGI-PER.