A guerilla or two with Mauser rifles and other odd antiques would be nice too.

I suppose logically, for the Portuguese, it might be wise to start from the bottom up, i.e. start with the most common weapons. So to add to what you've already done, an MG3, a rifle-grenadier and a guy with an M20 Bazooka (or even an RPG for the late part of the war). Other than that, more G-3s, guys with AR-10s as an alternative for Paras, etc, etc.
I can't speak for anyone else, but I'd be looking to create a 25 man unit of caçadores, with as few duplications as possible in it initially (riflemen excepted). Obviously with more options I'd consider making up additional types; Paras, Fuzileiros, GE etc.
That regardless, it's a great range and I'm looking forwards to additions (and of course them hitting Fighting 15's online shop

)