Lenny, so this for your upcoming Sumba trip?
The last few times I have been in that part of the world (Sumba, Komodo, Lombok, Alor), I had no issue at all with the simple set up I explained earlier. My setup was PE8 and PE10 braid, 200 lb mono shock leader, NT size 2/0 or 3/0 swivels and 170lb to 250lb split rings.
I would not especially recommend a fluoro only leader for popping as it does not stretch much and therefore the shock absorbing qualities are not as good as more supple mono. Also I have always been nervous about friction knots onto fluoro as it is such a hard material. Others may feel differently about that.
On twisted leaders, I suggest you do a forum search as there are loads of threads about these - how to make them, how to attach etc.