A bit of advice for this "lovely event" this is really lethal so remember to use angel sigh and no gear since you will get dura loss when you try it (lost my golden hammers).
ok so this is how you do it
take your time always
and keep running to a soldier
always stay near a soldier to click him as shield if bunny target you
first pull pin
then run to shield and click him
then take your time
press skill 1
again click on soldier
take your time again and find another soldier
then press skill 2
again click on soldier
and then use skill 3
and quest is completed
its "easy"