I would suggest you plan out your CB team before making that decision. At first glance, it looks like you'd want to run something like:
For Clan Boss: I think I'd like Jareg, probably more than Giscard. Jareg has another turn cooldown on the defense up, but then we get ally protection to go along with it. Giscard would be better in more areas of the game, but I'm not sure that makes him a better option than Jareg.
If we really want a champ that does what Giscard does, I much prefer Ursala, who we already have built.
As for after Kalv I'd be inclined to go Venomage or Vogoth. If you feel like you're need a little more help in Dragon (I don't think you will) I'd go Venomage. Otherwise, Vogoth.