So, my husband and I just did this quest...knowing nothing about it except that it's the one in which stealth is good and that there's a scorpion sitting on a pressure pad at some point that has to be distracted.
We tried to do all the optionals, but we weren't as stealthy as we could be.
We messed up on 1 of the guardian scorpions and didn't get that optional.
I kept getting spotted by the roaming scorpions and didn't get that optional.
So, we got to the "don't loot the giant's tomb" optional and thought "hey--here's an optional that we CAN accomplish. Yeah, we'll miss out on these 2 chests, but we'll get whatever chest is at the end."
Uhm...yeah...about that. So, it would be good to know that if you are not stealthy enough to do the 2 stealth optionals, that you shouldn't bother with the giant's tomb optional. Otherwise, you get absolutely no loot from the quest beyond the end reward.
That seems like harsh punishment for failing 2 optionals and succeeding on 1...especially since failing 3 optionals gets you 2 chests.