Whilst it might seem like a good idea to put beast wizards in units of gor for the extra strength and toughness, plus giving them an extra hand weapon. But because of that both units have a combined cost of over 800 points. That would get you 40 Chaos Warriors with MoN, Halberds and Shields. They have better S regardless of magic and a better armour save to mitigate the extra toughness, plus there is less chance of a wizard exploding and knocking half the unit out. And because you are putting dice every turn into those two spells, you are not going to have enough spare dice to make proper use of Malagor.

Malagor works best when he has plenty of dice in order to gain massive bonuses, but your list takes that away from him because you need spells on the Gor, replace them with warriors or something else and drop one of the Bray Shamans, Otherwise drop Malagor because he costs over 100 points more than a lvl 4 shaman and has nothing to show for it.

I think 10 Blightkings is too many, break it down into two units of 5. Otherwise they are too wide to attack and to hard to move properly, plus the back rank only get one attack each, meaning that, at full strength, you are down ten attacks.

It's not that gor suck. Without the beast banner, they do nothing. S3 and T4 is meh. Beast magic is an ill fitting glove of a substitute. As it's highly probable that you won't get it, and requires putting a shaman into combat.

Either drop the gor for plaguebearers or warriors, or get a unit of 50 with the Beast banner. Put a wildform on that unit and it becomes tough as nails.

I'd try and find the way to get your bsb the dawnstone. People will be directing attacks against him like no other. I know I would if you played against me.