Drop rate is probably the same for every piece. You are just having bad luck.
I've been opening 5-6 chests(Maj al-Ragath) at least 5 days a week for 2 months. Not only is Slimecraw by far the rarest set to come out of this chest, the medium one just doesn't exist. I've easily used 200 keys, and i've gotten maybe 7-8 slimecraw shoulders, most light, 2 heavy. The drop rate on those shoulders should be a lot higher, that's all i'm saying.
I've been opening 5-6 chests(Maj al-Ragath) at least 5 days a week for 2 months. Not only is Slimecraw by far the rarest set to come out of this chest, the medium one just doesn't exist. I've easily used 200 keys, and i've gotten maybe 7-8 slimecraw shoulders, most light, 2 heavy. The drop rate on those shoulders should be a lot higher, that's all i'm saying.