From a thread regarding 6th/7th chest spawns, two diff ppl have stated that after templar, no one can die at all. Get to jumping puzzle, spawn the alt route (left top cave route), get down to hidden cave under top and chest is there. However, there is zero hard proof at this time. Vault of Grass to the rescue. I can get to this cave no problem w/o dying. I want to try this tonight, possibly with 6 bladerunners for ease on normal or whoever. I'll update the thread once we have/find new info.