it hasn't changed since launch but the blighted village's smith chest still explodes if it is wet and this explosion is considered being an attack from our character, meaning any additional passive damage or effect would be applied to the surrounding crates or our companions. our companions also react as if we were attacking them and, obviously, blowing in the keyhole to disarm the trap is an impossible task...
now, more seriously, just leave your team back, get naked, equip the raindancer, get into turn based mode, make it rain and then open the chest. simple...
