Well guess what.
Linemates
Sorry to disappoint you, The Fall, but Chiasson wasn't really trusted with first line duties in Dallas. The few times he lined up with Tyler Seguin and Jamie Benn during the 2013-14 season only totalled to 68.85 5v5 minutes, about five or six games' worth. In that time, they produced a 51.97CF% with 44.64OZS%. Apart, Benn and Seguin went on their merry way (51.1CF%, 53.0CF% and 35.2OZS%, 34.7OZS% respectively) while Chiasson went some other direction (48.5CF%, 34.8OZS%).
In Ottawa, we get a different story. For the 2014-15 season, he spent the most time with Clarke MacArthur and Kyle Turris in a second line role.