Coil Group is PLD, WAR, WHM, SCH, BRD, MNK, BLM, SMN. There exists 9 different weapons from t9.
Week 1: 88.9% chance of getting useful weapon. Get PLD weapon, yay.
Week 2: 77.8% chance of getting useful weapon. Get DRG weapon, boo.
Week 3: 77.8% chance of getting useful weapon. Get DRG weapon, fuck you SE.
Week 4: 77.8% chance of getting useful weapon. Get MNK weapon, yay.
Week 5: 66.7% chance of getting useful weapon. Get BLM weapon, yay.
Week 6: 55.6% chance of getting useful weapon. Get MNK weapon, gdi SE.
I hate this drop system. It could be worse, but I still hate how many times favorable percentages gave us unfavorable results.