Discovered my mistake. I overlooked the Imperial City. Now I have all the skyshards except the 3 I still can't get in Cyrodiil. There is 399. There needs to be about 460, cause this one character in question is an Orc/NB/Crafter/D-wield+Bow/Werewolf. And there's not enough skyshards for all the skills he needs to be complete.