Works pretty well, though I'm not sure how well two Assassins stack. Bear in mind that Solas will not be available to use as a party member during Trespasser, though, so you'll need a different support during that DLC, at least (luckily, all party members scale to the Inquisitor's level, so you can sub just about anyone in and craft 'em some good toys by that point).
Formerly a panda, formerly a carnivore. Now just a guy without a catch phrase. https://imgtc.com/i/uVS7l1o.jpg