Pay is crap. So are the living conditions mostly. The average house in the south pacific would be condemned in most countries
Unless you hold an ATPL and get turbine command, pay is way lower than NZ or australia.
Airways NZ produces a south pacific flight guide. Jepp have plates also. They're not overly fascinating, nothing you havent seen before.
CASA question, sure they do, hours are hours :-) and most jobs 700/year - 1000/year. some places you can fly on your australian licence others (fiji) you convert to local CPL. (law exam + CPL/MEIFR flight test)
navaids mostly NDB, isolated ils's and vor/dme's. some great IFR weather in summer, thunderstorms and cyclones.
If you think Fiji is primitive... bear in mind Suva is the new york city of the south pacific
other pacific nations are a lot less developed.
