Depends what kind of group ride you’re trying to simulate! They vary hugely. From the easy coffee ride which is 3-5 hours of mostly zone 2 riding, maybe with a few sprints sprinkled in for those that fancy it, to the full on drop ride which is basically a race, and everything in between. Sounds like you’re after something like a drop ride/race simulation in which case the ones you’ve identified are pretty good and you can always extend the cool down (or edit them) if you want to go longer.