Fedu and All,
yes, we're downhill on Big Game, but fishing grounds are rich in non-migratory species as well.
Manganga (speaks good English) contacts in PM to you Gentlemen, he permitted, but as Fedu said perfectly fair: most BG is over = be patiente or specialize. Also a matter of arsenal, which you have access to...
Water is 23 to 26°C, so Whale Watching is on full swing, so if you permit me an opinion: do share a big charter, throttle up, troll for Marlin and put smaller YFin lures on the long riggers + load drinks on the cooler and bring time (... if it rings, it rings big time). A fair 50% chance... that nothing goes... or like the tuna here below?
Other than that specialise and take a smaller charter just under the Barra do Dande cliffs and slowly troll Rapalas for Cuberas. You'll loose most, but catch some nice Snapper (is that RSA rock cod?).
PM to follow asap.