Dorion, on 21 October 2014 - 07:34 AM, said:
Hey Guys,
Would like some help in understanding when I should use Standard Armor vs Ferro Fibrous. Like a noob (which I really am) I always want to use FF because it frees up tonnage. That's my impulse, but I realize I really don't have a good understanding of when I should or shouldn't load it onto my mechs. Any explanations would be greatly appreciated!

Generally speaking, Endo Steel is used on most mechs, IS pilots have a space tax of 14 critial spaces in there mech for it, FF for IS mechs also uses 14 spaces.
It's good to use both Endo Steel and FF on light mechs, generally with an XL engine as well, as they need as much free weight as they can get.
Mediums, will often see both, sometimes all three again, this is a case of they usually have excess space, but not enough tonnage free.
At heavy and up, you will often see just Endo Steel, as they now have a lot more free tonnage to work with to begin with, but would be critical space starved if they used both Endo and FF.