Think about latias is she can be used as a fabulous defensive and offensive pivot for other sweeepers, namely other dragons and I have found her to be immensely successful with other dragons on dragmag or draggene, drilling holes while staying alive more often than latios and because latias is never expected to be as purely offensive as latios the offensive set latios uses works on latias as well, making latias deal out more damage than opponents might expect.
yee says everything else that I have not mentioned.
O - I am an Atheist and proud of it! Copy and paste this if you are too. - O