For people who haven't read this part of my last article here is some quote on how much gold is required:

Firstly - yellow mission with avatar changing now required to spend 50g in store instead
Secondly - green mission with raising RW (M28) is changed to  - "Spend another 100g in store"
Thirdly - red mission (M38) - "Spend 200g in store" is kept the same
Foutrhly - purple mission (M47) was raising RW before,  and now it is changed to " Why shouldn't you spend another 300g in store"

So for all missions you need to spend at least 650g in store (make it 700g, since there is nothing in store that is worth spending 50g, hence blue stone for 99 is way to go).

And for somewhat broken naval missions (missions 24 and 42) - those missions dont count naval hits in your country fights, in ally fights nor in RW fights. You can fight in other country naval RW but only for defending side, or in other country naval wars, but only for countries you dont have active MPP.

I've unlocked some missions so far, and mission 44 is changed. It was 40g from medals before, and now 10g, but it will quite harder since we only have true patriot medals now.