I'm guessing when you say Stormtroopers, you really mean Stormboyz, in which case you can only have 1 Squad as per page 11 of the Armegeddon Rulebook.
I'd say in general you are relying on your high point models too much.
But I only know orks, haven't played them yet.
Plus if it's worked for you in the past, stick with it.
Mike