A big problem I've seen is, people think there is a mrd/gla rivalry, when you need both leveled up for the job. I've seen a lot of bad WAR thinking they can get to 50 using only their WAR abilities. PLD its actually less crucial to have mrd, but honestly if you're a career tank, you should level both. Most PLDs i've seen are good tanks actually, the few bad tanks I had were WAR, not all WAR, just the few bad tanks I had. Many WAR think, I'm just going to eat damage that's my class, but there are ways on mrd to take a few less licks >< and help your kind healer's mp (aka me). If you think the GLA quests didn't teach you to tank, what about "is it a rock, CLEAVE IT!" the general theme of mrd/war quests haha.