My best advice is try to give most of your team a way to revive each other. Chemist, White Mage and Monk. That can buy you a lot more time in the tough battles you could be locked into. Monks are especially OP because they can support and have really strong attacks, like shockwave which can cover the map if the elevation allows it.
Good luck!

More fans and/or a portable A/C certainly seem to help. If there is air moving over you while you sweat it will evaporate faster and cool you down as intended, making you more comfortable. You can't really stop sweat altogether, only manage it.