Hey there i've played some doubles and it is pretty similar to vgc except hazards are sometimes used and obviously you are using all 6 pokemon, i would recommend putting protect on a couple more pokemon as it is always good in doubles, focus band isn't really used on crobat i would change that but i'm not sure what to i've never used it maybe black sludge?, also i would have some form of speed control e.g. tailwind or icy wind as this isn't the fastest team and lots of people will be using there own tailwind (I would put tailwind on crobat) hope this helps 
oh and when you've finished i'd be happy to battle you to help you to test the team
oh and when you've finished i'd be happy to battle you to help you to test the team
