Konoha: Beast/Illusion or Beast/Dream, with the Illusion/Dream typing referencing her ability to Shapeshift.
Naruko: Water, referencing her ability to call forth whirlpools.
Miyo: Ghost/Water, referencing being a ship phantom similarly to Murasa
Tsubame: Water/Reason, water being her ability to walk on water, reason being her ability to foresee the future.
Kasumi: Water/Illusion, water because she's a clam, illusion because she causes illusions.
Megumi: Water/Dark or Miasma or something, Water being her mermaid species, Dark/Miasma being her ability to control liquids in general.
Mikoto: Faith/Nature, Faith because she's a goddess, Nature because she creates life, however, swapping nature for water for the sake of the theme and because we need more water types wouldn't be too much of a stretch.
Otohime: Pure Dream, Heart/Dream, or Water/Dream for the water theme. Dream because of her ability to manipulate cause and effect, an aspect of reality, which Dream-types are often associated with (Reimu floating out of existence, Seija inverting things, etc.)