I think especially in humid areas, sativas typically have better resistance to mold and rot. Specifically the dense bud structure of indicas can hold in a lot of moisture that eventually causes problems. Also narrower leaves helps the air circulate better around the buds.
67% humidity probably isn't too bad. Pretty high still but not as bad as some more tropical areas where super narrow leaf varieties grow. You might find some success with sativa leaning hybrids, but my experience is mostly in 40% humidity. Even still I'll get bud rot occasionally on really dense indicas. I'll send you some stuff to try out, and you can go with whatever works best. I'll send you a dm to get your info.
I'm also thinking about growing a few of the Nigerian sativas next grow, to hybridize with jungle spice. That'll result in a 75% sativa. But I have to finish my current grow first, so I probably won't have seeds to give you until September timeframe.