come on now... 91% and fail.. really my luck sucks that bad? lol
sad, it was for a treasure chest.
still fun, lacking a little on the gear check but thanks to missions most of my crusaders are 200-300

Jeweled Chest, while sad, is not as horrible to lose one of the really rare event-gear/Crusader missions...
Have had between 70 and 88% chance of success on all of those missions. Done at the very least a dozen of these. Only 4 of them were actually a success :(

If we had a choice of either doing missions as they are, or a choice for the mission to be a 100% success, but then with greatly increased time to clear it (time increased depending on the % missing from a mission to regularly succeed), that would be awesome.

Example figures:
For each 1% from being a guaranteed success when doing it normally, you instead add 2 hours on a "guaranteed" mission.
So, if you have 88% chance to succeed doing it normally, doing it the "guaranteed" way would add ((100 - 88)*2) hours. Which would be adding another 24 hours.
With a 70% chance normally, it would instead be enlongated by another 60 hours, etc.

Dunno if that would be a reasonable choice?