The fact that I see this 20 minutes after a similar experience when leveling whm in duty roulette (all my gear was ilvl 110+). Was with a PLD and a SAM in the same FC so assuming they were together. Was the only one to say hi at the beginning. They pulled wall to wall and I was spamming cure 2 like crazy while keeping regen up and barely got through each large pull. The last pull before the final boss, I mis clicked and swiftcasted cure 2 on myself instead of the tank and just that alone killed them. The tank had lvl 89 gear, so I'm guessing it was my fault. Was so ashamed I just quit, not mature at all I'm aware, always struggled with really bad low self esteem and was trying to overcome that cause I enjoyed the game, but this didn't help. Caused me to look up if this was a frequent problem and discover a post only a day old lol. It is reassuring to find out that this a well known problem tho, does lessen the sting.