So, when i started doing my argent tournament daily it would always take me one or two tries to kill the champions for the duels. I've gotten better now but i didn't know this then. Now this really helps if you have a buddy with the same problem. But i realized after you duel them someone else can attack and basically kill them for you. All you gotta do it try to keep their shields down and your buddy can easily kill them in about 15 seconds. But now i usually do all the dailies with my friend and we can even do this together which lets us get through all the dailies in about 15 minutes. That's about 120g for the both us for not even having to do any work.