Getting pretty tight now, since you have to be in a certain area for the nades to register. So the only timesave left is right at the end. Could go down by a second or 3, but the ending is very RNG heavy. You don't actually need to kill everything there, but it's RNG wether the enemies become part of the quota that needs to be filled (think it depends if they're close to the bridge area or not). So yeah, just going straight to the door and hoping you only need to deal with the upper enemies and not get followed is a pain now...