That Dragoon is a derp, plain and simple. If he hadn't gone all Billy Badass and used the LB for Final Heaven, then the run would've been easier to finish. Half your party was dead (through no fault of yours, how are you to blame if the MT disconnects or if your healing partner eats a WoTL?) and he wants to get on your case? You finished the run in a terrible situation. That speaks volumes to your ability as a healer.
True. Even as a tank main, I find myself not paying as much attention to party hp levels and such while DPS'ing. The difference is, I tend to ask "What happened?" rather than simply laying into someone.
Yes. Yes it did. Any tank that says "I know what I'm doing" while tanking Titan with no Shield Oath is lying. ;3