so you believe getting 70k xp in 5 minutes for doing a heroic mission is a waste of time? (double xp weekend!) 70 x 7 = 700k xp in about 40 minutes. maybe you don't think it's worth the trouble but I like getting my guys from 50-55 without leaving my ship. even without the double xp, it's still really good xp for the time spent on them.
I'm guessing most of you are staying in the middle of the screen getting blasted to atoms. because that's exactly how I started out. watch some youtube videos. you really have to use the keyboard and move around. I used to have the same problems, now I can do Cha Rabba with full health at the end. just takes practice.