We are short 4 infantry battalions at the very least.
Himars etc are awesome, and a very nice to have bit of kit. However, if I were the target of their wrath, apart from drones, I would be using SF to target them. They need to be defended, and in all reality, infantry patrolling for SF, and other counter SF is going to be needed.
All major assets need infantry support, in order to do their job. You can't just whack a nassams battery out there and leave the crews to sit and wait, they need to be protected as well, otherwise, enemy forces can just sneek up on them, and take them out, and the crews themselves need to do their jobs, not the grunt jobs. We are very infantry light. Critically so, just like every other area in our defence force. LHDs can't protect themselves, airfields can't, powerstations can't, and ports can't.