I see no glaring defects in your list. You have plenty of heavy templates to drop on the traitors, and a good mix of anti tank and anti infantry support guns as well. Some may question the multiple Sentinel configuration, but I actually prefer in large games to group them also. Usually they will not be a priority target, and with multiple shots from a platoon, you are more likely to have success against their intended targets. However I like one platoon to be Armageddon pattern, and the other Cadian pattern. This way you can have some specialized tank hunters, so you can spread your templates around elsewhere. Again, this is only a preference in large (1800+) games.
