User blog comment:デルタ/Repost: A letter against Hadaron abusers/@comment-24299339-20150318040121

Honestly guys, Haderon isn't useless. Considering that you only get hit by AOEs, Haderon is just limited to areas where AOEs don't one shot or debuff. It just makes you play the game properly to heal at the right time and don't just leave your device there on autobattle.

Btw, you can't kill a raid boss with Haderon anyways, it will go way over the 30 mins limit after a while