First of all, “custom portal” = “the portal which is created by the player”.
My idea:
I think, we should be click the custom portal anytime when we open the world map. Currently, this game does not allow this thing. First of all we must go to a pre-defined portal, then we can use the custom portal.
How would that work? At the moment you click on a rift in the map without using a predefined rift you create a new rift, meaning that the previous personal rift would close instantly, so you would no longer have a destination.