So double battalions is tricky. If I was headed down that route I would prob combine up the horrors and take royal family as the 2nd.
That way you get an additional extra attack spell, and the 2 GKs on foot can dump 2x10 ghouls on to the field to be chaff or grab objectives.
-1AA -200
- battalion -110
- 1 unit of horrors -160
+ 2 AGK +280
+ 1 Royal family +120
Net is 70 points to play with, just some thoughts