Rift Mage or Archer Rogue?

Both are good fun I think so I don't think it matters too much to me If I were to choose I'd go mage for DA2 and Archer for DAI. Purely because I don't think DA2 works quite as well in DA2 as it does in DAI at least for me. Both are good fun though. Although I've got to asy Rift mage is my favourite spec though plasyed one in my last run in fact. Current running as an Archer rogue trying to unlock Varric's specialization for my quizzy. Haven' tdone it yet but that's kind of where I'm at atm. Along with preparing for the Here Lies the Abyss and Wicked Eyes wicked Hearts quest.

Either one can be a lot of fun in DAI, although I prefer playing Knight Enchanter myself. You don't necessarily have to specialise as an archer in DA2 because you can switch weapons mid fight if you want, you just have to pause the game. Personally I had far more fun playing a dual wielding rogue in DA2 (swapping to a bow when more appropriate) but an archer in DAI (because the control of a dual wielder was really clumsy to my mind and you couldn't swap weapons mid fight). So I'd recommend playing a mage in DA2 (I played a force mage/spirit healer) and an archer in DAI.

yeah that's one of the things I'm loving about playing an Archer right now. It's one of the things I like about playing a Knight Enchanter as well as I enjoy playing characters sometimes with that much power at their dispoasl. Not too effective on DA2 based on what I've played but on DAI even the dragons take tons of damage per strike from me I rememberlate on in my last run as a dwarven rogue a couple of playthroughs ago I even made pretty short work of the Qunari in Trespasser as they went down like flies. My dwarf Tina  started out as a dual wielder but switched to archery late on and caused some real havoc to not only the darkspawn in Descent but the Qunari in Trespasser as well. I just brought down my first dragon with my Rachel Travelyan the Northern Hunter. Mostly because I wanted to start collecting dragon materials now for armour and weapons as I find them the best materials in the game to use for me and I'm now at a level I can safely start doing it.