Tempest414 wrote: we could then give disembarked platoons a single 60mm mortar and sections this 20mm system
With everything you have written "in" I think we can skip that 60mm and keep it in armouries for troops helo-landed, and no other - at least in the first instance - means of indirect fire further out than the AR-underslung grenades ( 300m ?)
Tempest414 wrote:the Wiesel 120mm mortar system witch can be carried by a Chinook this would allow the same for 16AA with 6 Wiesel 120mm mortar
The Wiesel is an ingenious family of AFVs, but dates back to the days when there was a full division that could be "ferried out" to somewhere else than the Central Front
... and the contract with Lufthansa allowed commandeering their Jumbos, installing stronger floor plates (pre-stored) on them, and every a/c could take seven

Wiesels
I believe there are only 8 of the mortar variant left in active service, so that the tactics of CH-53s taking them to where ever they might be required can be practised
- the CH-53 replacement, itself, is an 'endangered' project
... which is a pity as for getting mountain-capable troops up to Norway, plenty quick, would point to the remaining mountains troops of Germany; and getting their fire support by other means than by mule, into the right spot, again plenty quick (once on the scene) would point to exactly that kind of 'combo'