1.) Picking up and enemy and throwing them never(?) failed, at least not that I noticed while skimming through the gameplay.
If I am able to do it, it never failed for me either. It seems there is a roll made if thrown character/item will hit the target, but not if it will be picked up and thrown - will investigate further this evening. If so, then it's guaranteed insta death for character light enough to be picked up.
