I've completed ME2 once, as a soldier and on the medium difficulty(or whichever is default). I found it pretty easy so on my second play through I bumped it up a couple of notches.
Although this time I tried played as an adept and frankly, I'm struggling to see the real benefits of using bionic powers(like pull,throw etc) over that of a soldiers adrenaline/concussive.
Does anyone recommend another class other than soldier for higher difficulties?