hi,
I am very new to the sport, but on my one and only jigging/popping trip (so far..!) so far, i would recommend Nosy Be (madagascar) as a little known location. Huge diversity of species - i managed 4 GT's over 50 kg's in one trip, including a beauty over 60 kgs..! There are doggies about, but not as big as elsewhere. As for the rest - plenty of pelagics - sailies, marlin etc..