I don't think we'll be looking for more defensive prospects at the moment, especially RD.
Currently in the pipeline we have Parekh, Brzustewicz and Mews as RD, last season Parekh and Brz were 1-2 in defenseman scoring in the OHL, this year Mew leads the OHL in defenseman scoring, Parekh is 5th (his PPG pace is right there with Mews) after a bit of a slow start. On LD we have a few defensive and 2-way types in Solovyov, Grushnikov and Kuznetsov, as well as another offensive defenseman on Morin (2nd in defense scoring in the Q)...
Then on the NHL roster we have Kevin Bahl (LD) who is just 24 and has emerged as a legitimate top-4 defenseman this season, and Pachal (RD) who has really looked good as our #5 and is just 25 (I personally think his game can still grow more into a physical stay-at-home middle pair guy).
Hage, the better of the 1st round picks (top 8 protected) and Newhook/Dach would make more sense for the Flames.