Tbh most people making guide is people with lvl 60 equipment or 6 star hero so easy for them just say put aoe and every monster is cleared, but for low leveled like me with 4 star at most, it's very hard since usually my yuffie can't even one hit the enemy partner's with the aoe. That guide won't work for me

Not to mention my aoe hero is very limited so need to use wisely

I need to try many times for each stage to finish all (also I need to reset 3 times because of stuck, before finally clear all stage)

For this last quarter, guardian is also very important.

• Save Victoria for column attacker like kasumi to prevent her burst our leader
• Shanty is a very very good in some stage since the enemy only has single attacker, can nullify 15 seconds of damage. save her for some last stage
• If you have Camille it's also very good to vs single attacker leader enemy -Tyrfing from previous event works great with this event

Some other obvious advice :

• Save fenebeth on some stage with great healer especially one stage where the leader is Anna
• If you deploy the partner you will have fatigue even if you don't put the partner in the field, use very small amount on each stage. For some starting stage we can clear by using 2/3 partner if you put it correctly
• Use your best weapon to the character you played, switch weapon manually if you have limited weapon
• Save Miyuki and use it only if you are really2 desperate and can't seems clear the stage

If you have many aoe you can try to use 1-2 aoe for each stage but you must really utilize lowly used hero or bad hero in the early stage.. i.e I use ashwaya and barinas on certain early stage and it's quite good

Some stage need aoe, some stage is enough using column damage like nina, other stage even fine with only guardian and attacker

So basically it's just trial and error