to beat yunalesca use your aeons and save your overdrives. turn one of your people into zombie before the 3rd form death dosen't affect zombies. then steal from yunalesca. you'll recieve talisment if you have auron(or anyone over 6,540hp) use them on thawt person their life will sky rocket to 9,999hp. then use as manyover drives as possible oh and have all your aeons on overdrive. that'll help.