Don't use GFs, they hurt Rinoa!!!! There is one thing that is call MAGIC! Use it... the only G.F that you can use is Cerebus... When I beat Adel I had 9999 of HP on my characters but don't worry, just make sure taht you have Curagas and Cerebrus and Auras, coz limit breaks maybe really useful... cure also Rinoa coz Adel keep draining HP of her... Now use Meltdown also and attack her with magic and limit breaks.... Don't do attack coz in FF8 attacks aren't that powerful... ok do this and you'll beat her...