Not sure if troll or just stupid
Neither. My post is irrefutable.
Chooses templars over mages because of aesthetics, a bug and dialogue options, ignores that time travel plot involves averting bad future and pukes on people because of it. 
A bad future you caused by getting pwned by Alexius, whom you knew had set a trap and controlled time magic.
Wat. It's not objectively better. You could just as well go with the idea (which is presented first btw) that the mages can help close the breach. Solas, the one who actually managed to suppress the mark so that the Inquisitor survived, is the one who presented the idea in the first place. Story relevance doesn't make sense, since either path presents you with an enemy faction that you face throughout the game, one of which being a cult that worships the ancient darkspawn.
But the thing that bothers me most about the Templar path was brought up by someone else. Even if you get the Templars, you still face legions of red Templars anyway. It's like the rachni queen all over again.
But there's no reason to go for the mages when the templars can provide more help to you. The idea that the mages can help is based on the theory that they would pour their own magic into the mark, which could have adverse affects on the Herald.
You don't face legions of red templars. You face small groups.
The Templar route probably takes months to arrange and execute. Realistically, it's quite a gamble if your Inquisitor already knows that Redcliffe is under control of a hostile force that has some form of time-bending magic and the ability to open rifts.
If they have time-bending magic, then it doesn't matter how long it takes. They did whatever they were going to do already. 
That's where it becomes a gambit. One has to hope they don't turn Redcliffe into a demon-infested crater, or worse, during the time in which arrangements are made to meet the Templars. On the other hand, you can address the immediate problem, but can only hope that everything goes according to plan and you don't simply fall into a trap.
Not the Inquisition's problem. Let the Ferelden crown deal with it.
Address the immediate problem by walking into the trap and hoping it goes well for you? No way. Assembling the Orlesian nobles shouldn't take long at all. It was only 10 Orlesian houses, and they may have already been at Haven. Some Orlesians have relatives in Ferelden already.
Except your advisors straight up tell you that the Venatori are mobilizing for war and they'll be long gone by the time you get the templars.
Also, in some reality where the Venatori didn't leave after all the time spent getting the Templars, did you forget Josephine outright stating a direct attack wouldn't work because it would start a war with Ferelden?
Long gone is fine. As long as they are gone. And if they attack, then you have templars to repel magic.
War with Ferelden? How? By attacking mages that displaced an arl from his castle?