How many group shots? 10 to 12 max without affecting time. Below we have a general shoot list to give an idea.
B&G + Entire Wedding Guests
B&G + brides parents
B&G + brides parents + siblings
B&G + grooms parents
B&G + grooms parents + siblings
B&G + both parents, siblings & partners + kids
Bride + her GRANDPARENTS (if any)
Groom + his GRANDPARENTS (if any)
B&G + bridal party (bridesmaids, flower girls, best man, ushers, page boys)
Bride on her own + bridesmaids, flower girls
Groom on his own + best man, ushers, page boys
B&G and friends
A conclusion is to plan your group shot list with time limits in mind. This is to be arranged with the wedding venue as well as the photographer, once completed and finalised send a copy to your photographers, and the venue is require.