Force Mage/Blood Mage combo was pretty op. I did in fact fight him as a dual wielding rogue and didn't find it that hard either tbh. Never really got into warrior though.
Yeah, BW fails horribly at balancing the mages right. The worst case for me is Knight Enchanter in DAI. In DAO you at least had to build the party around a mage to make him OP (like with 2 other mages and Shale, that was pretty fun), here you can just swing your lightsaber to victory.
I was an archer in DA2, the only abilities I could use during that fight was decoy (then I could do some autoattack dmg), assassinate and stuff like these. If he ever got close to me, he impaled me on his sword and I got an IK (and I put quite a lot of points into constitution). Don't know how much the difficulty was changed after patches, I played it only in its vanilla state (mb with patch 1). Hopefuly I'll have the time to play the game again, despite all the hate I quite enjoyed it, certainly more than DAI.