i'm thinking not TOO dry, but i don't think that'll be possible in singapore. you just don't want moisture seeping into your wood.
right now i'm thinking of getting thirsty hippo and keeping my bass in a hardcase when i'm not using it for more than 6 hours (i.e. overnight, non practice hours)
and dehumidifiers beat air-conditioning sometimes, cuz when u bring your cold guitar out for a jam, u gotta bring it out of the room, so it'll condense. unless you're patient enough to put it in a cool room and wait for it to warm up, slowly wiping off the "sweat"