The AMOUNT and SIZE of bones and skulls should INCREASE or DECREASE depending on the armor type, cloth, leather, mail or plate.
------HEAVY PLATE ARMOR------
ORCS PROTECT their bodies with the bones of their ENEMIES
ORCS plate armor should be most of BIG BONES with LITTLE METAL and LEATHER BEHIND, a bit like this style but more bigger bones and skulls, also ABS should be COVERED, except for PECTORALS and BICEPS.
I must insist with bones, because BEARAN are kind of a WILD/SAVAGE/TRIBAL race and the armor style can be similar, so the BONES and SKULLS can differentiate ORCS armor style.