Honestly they should have just made this a quest reward instead of raid. I get the argument of it gets people doing the raid more than once but as it stands people are gonna be doing it weekly for their gear and coin anyway. On top of that allowing people who have already won it roll again if they so please it just a kick in the dick to the people are trying to win it for the first time. I've done this raid 14 times already and every single time RNG gives me the middle finger salute and that's that.