help I'm being forced to participate
EDIT: "A reasonable spread, in this case, means following the RC spread rules, but also having no duplicated difficulties. As such, you may have only one of each difficulty amongst: Easy, Normal, Hard, Insane, Extra, Ultra."
Maybe your song choices don't allow for this scenario within the bounds of "reasonable" mapping, but in a hypothetical situation where your top diff ends up being like 8* or just otherwise high end (you get the idea), I don't think you can create a reasonable spread with these rules. Thus I think this is possibly unnecessarily restricting the mappers, perhaps even unhealthily so.
Second showerthought; perhaps subjective (and your contest, your rules), but I don't see why you're enforcing Easy in the set. As far as representing your mapping skills, Normal will do mostly the same job, and RC doesn't require having Easy in any kind of sets nowadays either. Thus I don't see how demanding Easy in the set greatly benefits either the contest results or the future of the mapset afterwards.
In combination these two make me a bit confused about what you're aiming for here. Though as slightly referenced earlier, I guess song choices can either make or break this kind of rule in practice ¯\_(ツ)_/¯