Your brave to defend those islands, no quick way off.
It's about what units you use. Security units can be moved very easily with air transport. The Italian transport squadrons you start with are great for this.
So by pulling the extra (beyond what is needed for city responsibilities) security regiments I can cover the turncoat Italian units on each island. I like to ship in airborne, but they can also be flown in if, like NOSB, the Allied player makes a concerted effort to destroy port capacity.
As they get worn down the security units are simple to fly out, and an airborne regiment that gets worn down to around 30% strength costs only ~200 air transport to move. So I can cycle them out to Milan to refit and then send them back in for the next round at Corsica if I want to...
Security units and paras just sitting in defense don't chew a lot of supplies. Cycling them over airbases to resupply by air in the event you couldn't get much supplies in before ports are shut down keeps them in good fighting shape.
Also, the rough terrain defensive advantages are unaffected by artillery and engineers.
NOSB thought he was going to show me how easy the islands are to 'blitz'. But we're only
8 turns into the game and he hasn't sent back a turn in nearly a month. I tried to email him, and am hopeful it is just real life interfering and he can resume soon, but the reality is I haven't had opponent go the distance in this campaign (or WitE for that matter - main reason I quit playing it).
A key part of my Axis strategy is to keep throwing sand in the gears of the Allied time tables. Sardinia and Corsica are a big part of that because with just 3 or so division equivalents I can require a much larger Allied force to dislodge them. It also requires an Allied air commitment, which pulls them away from other missions.
I worded my Garrison question wrong, not the exact units, but your strategy.
Keeping it at just 100% in every region?
I've posted the garrison status page a few times, so you can see the situation. I tend to break my divisions up for digging purposes, and I move them around to keep digging and flummox recon. I like to bring most of the armor and mech down to Italy so I can fight. Winning fights raises morale, and you want your armor over 80 morale so they can make the most headway in enemy territory.
I had one game where my opponent chose to not fight in Italy. He took the tip of The Toe to meet VP requirements, but didn't even try to advance farther. I think we got into '44 still fighting over Sardinia and he quit.
Lots of small CV units or , less large CV units?
pulling units off the eastern front?
Meeting the garrison units is my biggest problem with VPs.
No EF box in this game, but for the rematch (underway now) we have it on. I think it makes things too easy for the Germans (e.g. pulling mountain divisions from Balkan security detail to fight in Italy), but it will be interesting to see how the patches have changed it.
You do have to keep an eye on which units will be pulled to the EF if you have that automated, as it can hurt you bad if you're not ready.
I kind of wish the garrison detail was changed to work as it does after Italian surrender and the invasion of France. Make territory 'flip' if not under the effective range of garrison units. Might have to step up the value of security units (which already has a bonus on range relative to combat units), but it would be less abstract than the current system and I think perhaps better represent the nature of OCCUPIED territory.
"War is never a technical problem only, and if in pursuing technical solutions you neglect the psychological and the political, then the best technical solutions will be worthless." - Hermann Balck