Kill 2 members at the beginning, Cheat using the multi item trick to get mega elixer and Dazers, Dazer him with and then revive the other 2 using phoenix AFTER HIS ARMS ARE BURRIED!(Also equip the last move materia or something like that with phoenix) Now have the 2 mime materia and and have cloud and Vincent have it, TIFA FOR HEALING AND DAZERS! Now summon KOTR(Knight of the round) 1x and then Mime the person who summond him and them mime the mimer......Ruby will recover after about 3 summons(Mimes) so get ready to dazer him.