Alright so the first chest in crotas end.... Once you go into the hellmouth you can walk left a little then go forward and there is a door there. If the door has an orange light above it, there is a chest inside. No enemies can kill you so you can just grab the chest and if it isn't there kill yourself and it may spawn in that room. Repeat till it spawns. You can do this with any 27+ character. I did it with 3 characters and got 2 radiant energy, gjallarhorn, and no land beyond (No land beyond is shit but oh well) so yeah... If you haven't gotten the chest yet go get yourself a free exotic