this will be the one time we'll tell you to go to yt for, and if their isnt one out currently, you'll have to wait for one to (com2us likes to break things and then not fix mock battles)
this gets in 11 turns
T1: S3
T2: S1 any mob
T3: S2 dark hell maiden
T4: S1 water joker
T5: S1 any mob
T6: S3 fire oniomoyo
T7: S2
then turns will rotate and you should be able to kill on turn 11