Sounds like you've just had some bad luck in DF OP I'm sorry.

I've had no issues with A8... I think I experienced a wipe once on day 1 or 2 of release and that's it. Good healers can mostly carry people not doing mechanics in the normal mode fights.. so wipes are pretty nonexistent as the mechanics are much more forgiving than in Gordias.

I hope your luck turns around.