Okay so I just hit lvl 80 the other day and I'm now being asked to start training mastery points. I check to see what I need to do to start and it says I need to do a story mission in the HoT expansion (which I have). The problem is is that I really don't know what to do. I'm nowhere near starting this quest, I'm still doing lvl 60 story and map completion. Should I just focus on the story to get to the point where I can start training these points or should I just carry on as I have been by doing story and map completion? I'm scared I'm going to mess something up for later. So could really use some advice.