I've seen this implemented before and there is pros and cons to this whole idea, one con is that with enough bossing and that little bit of an rng increase one could get 2-5 unique drops where as someone on a different game mode gets 1-3 unique drops in the same kill span meaning over time these players would most likely being the ones controlling the rate at which these items come into the game now with something like bandos armor or a godsword that isn't all that bad but with something like corp or nex where those items are meant to be rare it could start to devalue and flood the market but with that being said i'm not against it i just want to make sure this is something thought out and doesn't end up biting the server later on down the road