Mindfire
Istar
Can someone who's knowledgeable about such things list a variety of weapon and armor categories and then explain which weapons counter which armor types and vice versa in a rock-paper-scissors sort of fashion? E.g. X armor is designed against Y weapon type, but is weak against Z weapon type, which was designed to pierce it. I (and others I'm sure) would find that kind of information greatly useful. Bonus points if you use a chart.