I've made a Combat Extended patch for the Griffin, which can be placed in the "Patches" folder inside this mod's directory. The patch itself is based heavily on the one found in Jernfalk's Standalone Horses Mod, and modifies the Griffin to be competitive with other animals found in the game.
https://drive.google.com/open?id=1XpjofKW5rAusv_Pi6lfn9xYadYx4hL9Y
https://drive.google.com/open?id=1XpjofKW5rAusv_Pi6lfn9xYadYx4hL9Y