It sounds to me like you have too many 10's. Try something like 3 10's, 3 9's, 3 8's, then 7's to 5's. Just make sure you pick active 10's that know enough to put their SC under shields. It is amazing how many level 10 bases I've seen where the SC is out in the open like a bull's eye.
If you find a recipe that works, just stick with it, and rotate in 10's and 9's for wars. Finding active 7's is a real boon, so keep that in mind.