Why does everyone use the same EX skills in Dissidia?

this was recorded at 4 am to 7 am lol
GAMEPLAY USED IN TODAY'S VIDEO: https://docs.google.com/document/d/1vu5Wegx_CKOfrHS_5I8_WguaVT8HV19RcQfgvJwSCTo/edit?usp=sharing
USUAL OUTRO SONG: Quo Vadis by M2U https://www.youtube.com/watch?v=7pY2y3ABo_Y