Yes, as was stated in Australian Aviation Magazine recently 2 more, within the strict budgetary constraints, would be best for a variety of reasons instead of just 1.
As for real world practicality and possible future workloads then another 4-8 would be better and of more use than replacing the oldest Hercs due to be retired with a few newer Hercs.
Sadly, even if aircraft are avail off the line before it closes it all comes down to cash in the end.
