Hmm ...

... if this is what You experienced so far I believe it's for sure nice advice

I remember now this:
most enemies that are Warrior types have the best Melee Armour Rating and less Ranged/magic Arm Rat.
most enemies that are Ranger types have the best Ranged Armour Rating and less ....
etc ...
But thinking of Healers, Summoners and other kind of enemies ... hmmm ... I go examine these types more closely in the future!
Thanks again !