If at level with quest, no issue; However, if coming as/with Mentored, removing Auto-damage buffs will prevent one from "one-shotting" the golems. Bringing a Shaman and having their pet only attack will slow combat down enough to use device (read: SPAM the device) at 50% health before golem dies. If no pet assistance available, then equip previous-era gear which should prevent killing them too quickly.
Steps[]
Kill 5 an Osseous Corruptor. When he’s under 50%, use the Nechronosync item to make his body split apart. Then finish the mob and click on the corpse to get the update