The reason I even made this thread, was because I've tried around 18 (give or take) DF HM Titan groups, and not one of them has even killed the heart. It's as if you not only have to overcome the fight mechanics, but you also have to overcome your less-than-ideal group composition as well.

I guess all I can do is keep searching for pre-made groups, and keep queueing for the DF version. I'm praying that he'll go down eventually.