So...there is a total of nine possible amenities that can placed within a base, but due to size restrictions, a Dive hideout can only hold five. Therefore, which five amenities do you think are most important and which four would you consider optional?
They’re all optional, technically - everything amenities can do can be done at the Watchtower/Hall of Doom. That said, I consider bank, mail, broker, and the r&d vendor and station to be most useful. Don’t remember if teleporter is considered an amenity, but I’d prioritize that over the r&d vendor if it is.