Pretty much every single full run I've done involved getting every chest, fully deactivating both devices, skipping a number of mobs, and killing Shaula with maybe 15 minutes left on the clock... and we would get every boss chest except for middle-right blue.
I've also done a number of speed runs that involve getting 3 chests, deactivating only the south device, skipping maybe a few mobs (?), and killing Antares with probably ~40min on the clock... and while my memory is a little foggy, I'm pretty sure I've got 4 chests from some of these runs... That could be a bonus one from the speed while losing one for not deactivating the north device. *shrug*
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