I think it would be a pretty neat idea to see how realms stack up against each other in events like hardcore might growth or slaying events. The reward tree could look like the clan event rewards where the top realm will receive the largest reward. Yes this could favor realms like 10 and 12 since they have been around longer, though it could still be fun to watch and participate in.
Did you even read what the OP wanted? They want an event where, All the players in the realm contribute to that realms points These realm points are compared against each other The rewards are distributed according to how your realm placed This is different from an ultra event where you complete individually against players from other realms. In the OPs idea you and everyone in your realm will be competing against another realm.
Good idea mult 😊 For the older realms they could do FFA, too. It may make the normal game better if your realm had experience working together instead of looting eachother and whatnot.
Well I was thinking of avoiding FFA since that sort of defeats the purpose of a realm vs realm event. A realm would have to work together after all. If the event was FFA, it would come down to which realm had the most players sharing points.