hey there humidity is much less a problem than the very high temps you're seeing, you're aiming for 25°C max during the day and a decent drop at night, the temperatures make the plant make some denser buds. Nothing you can really do so close to the end though, the potency will also be a little bit affected. For the white pistils and general look and feel of the flowers, that's a genetic thing. So some plants have more white pistils than others and some plants take a little longer than others. Hope this helps ! 🚀