Hey, sorry it took so long for me to reply. Been busy.
I kind of don't have a legit source for making armor. It's pretty much just scouring the internet for things I like and making variations of it.
What I can probably say is, try to make the armor more epic in areas that matter on the character you are creating. For example:
-Swordsman: heavy armor on chest and arms
-brutes usually have big shoulder pads, helmet, forearm bracers, and knee pads. The rest is usually showing off bare muscle.
-try to make their important weapon as epic as the armor.
I hope this helps a bit. I would reference Warcraft, Hearthstone, and League of Legends.
Thanks
Pete