I managed to beat this at lvl 70 SCH with SCH as my first job (but 3rd character). I went 1/32, and I must say that the SE needs to change this G5 as 3/7 times you enter the battlefield you have no chance of winning ; ;.
Message to SE: Scholar is about STRATEGY . . . not LUCK .... >.>
GL to everyone who tries this, and dont give up! its not as hard as it seems at first.
See Wikipedia address (dunno how to make it a link somebody advise) below to see how its done PROPERLY and not some link written by a lvl 75 SCH with Novio Earring saying how easy it is to beat. ><