i think you have a good list if your looking to make a hard list. Finding a way to get two mournfang in might give you some flexibility. Also, try swapping one unit of bulls for iron guts. Its good to play with both as you will find different uses for each. remember that fantasy units are generally less maneuverable than 40k, so match ups you create in deployment often come to fruition.
Enjoy the ogres, I'm a long time player of this army. The more I play then the more fun I have bringing softer choices and more variety. I'm sure that you will enjoy the fantasy game. See ya round.