AotI: How can you find out what each enemies's MST is???

[Dark Emerald EXE]

If its possible to find i would really like to kno.
I saw that guide someone did that show how muhc damage you can referring to technics.... I have how to calculate down but as far as the resistants due to the enemies MST im not completely sure :-S

[Zoamel_Gustav]

http://psupedia.info/Enemies