The Elementals chapter currently has Air, Arcane, Earth, Fel, Fire, Ice, and Water elemental entries. Arcane and Fel elementals technically aren't, having a different origin from the classical four. Ice is also somewhat out of place, as it makes the element of water have two types to the other element's one.
Therefore, I suggest the following:
Take the Arcane and Fel elementals and move them into a new chapter. Possibly add in Light elementals and Void elementals as a larger "elementals of the six core forces" chapter. Though if we would be covering Light and Void (Voidwalker), as well as Order and Disorder, then we would logically have to invent Life and Death elementals as manifestations of those energies.
Balance out Ice elementals with other elemental variants. Magma, Dust, Lightning, etc. We could use mephits as a guide for the different types. These would also be moved into their own chapter. See elemental conglomerates for stuff from the RPG.
The Elementals chapter currently has Air, Arcane, Earth, Fel, Fire, Ice, and Water elemental entries. Arcane and Fel elementals technically aren't, having a different origin from the classical four. Ice is also somewhat out of place, as it makes the element of water have two types to the other element's one.
Therefore, I suggest the following: