I am going to check out both ways again. I feel I am pretty well geared and when I originally did this on heroic it never seemed an issue, only in the last couple of weeks has it become an issue. Possibly I am hitting hard on dps and not letting my tank getting enough aggro before nuking the mob. It is always a loss of aggro which causes my wipe. I am pretty much full t9 so I should be nuking them easily.