Real Fuel's boiloff works with the stock thermal system so you can adjust it using the stock thermal physics sliders. Between adjusting radiation and conductivity you can do whatever you want to it. I don't use the 3rd party parts (graphene radiators or 3rd party tanks) that you mention and have no idea how they are configured. To reduce or eliminate boiloff in Real Fuels requires both passive (tanks properly configured to insulate) and active (either stock radiators or the mod Heat Pumps which