One of my last matches had a Dragoon go through his main DPS rotation on me while I was under Attunement and then to my delight I see the melee LB bar going off knowing he just wasted it since I had several seconds of invulnerability left. I'd already marked him for my team to focus down (gotta do something during those 10 seconds where I can't move), and ended up chasing him back towards his team as his HP dwindled and finishing him off with energy drain. Knowing how frustrated he must have been already, after going from thinking he had me to wasting his LB and then dying instead, I decided to risk opening a bottle of Realm Reborn Red over his dead body before he revived back at his base. And who says going as a healer in Frontlines isn't any fun?