Yeah, drop the Lictor instead of the Raveners. I always find that my raveners do a lot more damage overall than a Lictor, point for point. I want to point out that all the warriors must get toxin sacs if you want them. They can have different bio-weapons, but not different biomorphs.
Yeah, the Carnifexes could be configured to be a bit more effective (2 Guns), but you are will end up spending more points too. I field mine with a Venom Cannon and Devourers.
I would get extended carapace for the Broodlord like Chuckles said. I would also get them for the Genestealers too, just to make them last a bit longer.
A word of advice and tips for the Broodlord:
- Once his retinue is killed, he is an independant character, and cannot be targeted unless he's the closest model to an enemy unit, so don't deploy him far away from the rest of your forces, and get some guants in front of him to keep him from being targeted.
- If his retinue is killed off, you can get him to combat more quickly if you have another brood that is between him and an enemy unit. During your movement phase, just stretch the brood out so that it is within a 6" charge of the enemy, and withing about 7" from the Broodlord. For the Broodlord's movement, move in and join that unit. Finally, charge the unit it. The broodlord will not get any attacks for the first combat phase or two, but he will be locked into combat, and safe from being shot, and when he reaches the enemy unit, they are in big trouble!
I haven't had a chance to use these tactics myself, but I came up with them after my first time using a Broodlord ended up with him alone in the field, and then shot down, instead of reaching the enemy and tearing through their units.