For me it's the opposite. The templars path is too hard to ignore, and the mages path is a no-brainer pass.
With the mages, you learn that A. Time magic is involved. B. It's a trap. C. Ferelden's Crown is on its way to Redcliffe to solve the problem. D. The mages are perfectly free to abandon Fiona and join you RIGHT NOW. There's literally no reason for you to do anything in Redcliffe Castle. And there are many other reasons why the mages arc is bad, as in poor writing, other implications, gameplay reasons, etc.
With the templars, you first see Lucius and his group assault a chantry mother, then mock you in pubic. Then you run into "Fiona", who can say that she suspects Lucius of being involved in the Divine's death, and gives a pretty good reason for believing so. Which means you have a good reason to investigate Lucius. You are under no obligation to meet with Fiona in Redcliffe despite the invitation. Logically, if you recruit the templars, then the mages have nothing to fear. So the situation already favors the templars path.
Everything you see in Redcliffe Village is just more a deterrent, in my opinion. Fiona's stupid deal, information of a trap, time magic (which you don't know how to combat), having to trust a Tevinter mage in order to have any chance of countering Alexius' trap, risking the ire of Ferelden for involving yourself in their affairs, etc. And for what? To ally with rebels?
With the templars you stand to gain the respect of the Orlesian nobility, the respect of the people, the respect of the Chantry, and powerful allies who specialize in combating hostile magic. This is another reason to ally with templars. If you ally with mages, there is nothing to stop hostile templars from attacking the mages and now the Inquisition as well, because their grievances were never addressed. But if you ally with the templars, then the mages have no reason to attack them or you. And even if they were to try they would be annihilated because they're weak against templars and they were losing the war already.
As for time magic and traps, I say let Ferelden's monarch(s) deal with that crap. Why risk the one person who can seal the breach? And theoretically, if time magic exists and has been used already, then technically there is nothing you can do about it, because it's already happened. Think about it, if Alexius controls time, then he has already gone back in time to do whatever he could, and now there is no way to prevent what's already happened. Plus, if Alexius is setting a trap, the best idea is to avoid the trap. And if he is planning on using time magic when you arrive in Redcliffe Castle, then the best idea is to not go to Redcliffe Castle. If he is to use time magic, let him waste it on Fereldan soldiers.