I've seen this happen often as well, when I'm a healer or dps and get a paladin as a tank during dungeons or 8-man content. I don't know much about paladins, but I do see a good number of them using clemency when it's not needed (above 50% hp). 10%? Completely understandable. But barely scratched? Come on... or is there a hidden clemency trait I'm not aware of? Like a damage reduction per clemency use?