With the ability to add riptide to the trident and basically be untouchable and kite, there should obviously be restrictions on it if it was to ever get added to Loka. One way it to make it similar to elytras where riptide would only work when you are out of combat so people can still use tridents if they want but riptide is not usable in combat situations. It would also make it possible to being able to die when kiting when and if tridents come to loka.