First time I played it, I went for two handed and found the game very difficult to beat, but I managed to reach the end (ego draconis, there was no FOV by that time), with FOV, I decided to try another approach (mostly because I wanted to remember every character I may or may not encounter in the add-on) and create a new draconis specialised in dual weapons and I found the game very very very easy. So, for me dual weapon > two handed.
However two quick notes : I think I have better spent most of my skill points on my second attempt and I heard one of the latest patch for ego draconis have changed some game mechanics on two handed, but I have yet completed the game when it was released.