Tough stuff challenge
Please BHVR, for the love of God, never EVER put this challenge in a tome again. Not only does it rely almost completely on luck if you're a solo player, but it just encourages people (myself included, unfortunately) to resort to just giving up whenever they get downed. Because why would anyone want to play a match when it's guaranteed that they won't get progress towards their challenge?
This might be the best example of bad challenge design we've had in quite some time.