It seems to me that all this discussion of hardware has not contributed to the question of need. In principle parachuted troops are used to surprise the enemy, and to perform short-duration missions that will allow heavier forces to benefit from and continue operations.
Prolifiration of air-search radars means that even in the less developed region of interest countries neither C-130 not C-17 are able to deliver their payloads with surprise because use of EF-111s will suggest to the defenders that something is up.
Then there is the issue of scope. C-130s are tactical aircraft. This means in-theatre missions. However the Australian Army in its own right will never have the capability to conduct the link-up over several hundred kilometres to reinforce parachuted units. Morever even the US Army has not seen the need to do so. The reason is simple - risk. Give that risk management is now implemented as part of ADF wide policy measure, using parachute insertion as a tactical doctrine is right up there in the red. It might be ok for small special forces detachents, but a battalion of 1200 troops (yes, 700+support) sustained for 3-4 days (best case) until the link up is just outside of Australia's capability, and had been since WW2.
However, having said all this, in an emergency and using some creativity and imagination, the ADF can utilize all its air assets, helicopters and aircraft to conduct a full battalion insertion in one lift, and still achieve surprise at distances beyond operational reach of the C-130s.
I have wargamed it, and it works. The big question that remained was...now that we have the objectives, what now?
Cheers
Greg