I just came back to the game and I can tell you for Juggernaut/Guardian this info is wrong.. at least for Tank spec Juggernaut/Guardian. when i came back I had enough crystals to buy the starter raid gear and had no WZ comms. So i had no choice but to pvp in pve gear and was afraid it would suck.. never did I have a match i made anything less then ten medals. and most I made at least 15+. so either i was just better than most people in my wz's or was just luck IDK. but now i have my full set of pvp gear so GG