Help
giants should be easy, u can try using water magic knight as leader with build of preferably despair+revenge with rune 2/4/6 on spd/crit damage/atk%, wind pixie on despair+focus on spd/hp%/accuracy, wind griffon on swift focus with spd/hp%/hp%, fire harpy on violent revenge with spd/hp%/hp% and last monster is up to you