Have Earth Genie full aura slows down enemies and decreases def. Air Shadow lurker with high speed so increases atk and fills turnbar of all your creatures. Water Angel Mystic will increase crit damage. Have Dark Succubus with 100% crit and as high atk and crit damage as possible. (I don't have a dark succubus so can't show here) The way you set your creatures speed matters. Below is the order in which they will take action.
Order of Speed:
Shadow lurker Fastest speed.
Water Angel Mystic next highest speed.
Dark succubus and Earth genies speed doesn't really matter.