Maybe add a buff wagon for your Halberd horde.
What size are your two demigriffon units? If three models per unit, you could go four models per unit.
If you like Karl Franz, maybe put him on the Griffon. You get a nice flying hammer, a general with an excellent Leadership radius, and free your Templar Grand Master to fight his own things without the need to stay within 12" of the main army.
Terribly expensive, yes. But opens possibilities, and flying units are always problematic for the opponent.
-Z