-Question about 'INT" and Element

[Alise]

Umbral elements are those that you can hold in your hand (earth, ice, water). Astral elements are those that you can't hold in your hand (lightning, wind, fire). If you increase your elemental affinities for earth/ice/water, your Umbral spells will be more potent. If you increase your elemental affinities for lightning/wind/fire, your Astral spells will be more potent.

So what about element based enemy? To fight aldgoat, it seem that Astral is more powerful (my all element are same at around 80s point) I wonder how does this calculate as Umbral, Astral on mob?

Can you give me a conclude of what element based mob should I use Astral? and what for Umbral?