Two tech's are carried on away J tasking, usually more if it's a complicated task. Haven't checked the latest P&C but I believe 1 LAC & 1 CPL are still slightly cheaper than a single FSGT or above FENG on flying pay/disability.
MEAO sucks up most of the J training capacity so things like MFP, PLF, PLAT haven't been followed up. Other stuff was cancelled like wedge or postponed like RAPSL.
Moving beyond ABNOPS to higher tier capability will be interesting. ARDU did a human factors study 6 years ago specifically into this and recommended more crew members to handle the load on tasks that warranted it. This will never happen with the career's that have been staked on a modern flight deck arrangement. Funny enough the Marines with the MC130J and AFSOC with the HC130J are employing a 4 crew flight deck. I guess the RAAF knows better.