The question on whether to employ Reservists in flying positions is possibly muddying the waters. However, there should be no question on the Army providing a second tier helicopter that can provide vital support economically to all the ground units that require air logistic support.
The pitifully small number of MRH-90s Australia can afford to field - (even if they all worked and performed to specifications, which is another question altogether) - is simply insufficient to cover the requirement, and if there's anyone out there who thinks that economy shouldn't feature in Defence planning in the foreseeable future, he's being totally unrealistic.
As a ground commander, I'd prefer there be a second tier helicopter element available that could get me vitally needed logistics, (even if not right to the battlefront), as well as move casualties etc back for treatment than do without any helicopter support because the very few MRH-90s were committed to more pressing tasking. A second tier helicopter element would probably be able to carry out 90, if not 95% of normal tasking, leaving the cutting-edge stuff to the state of the art MRH-90.