Note: Building any thrones in the throne room will make both thrones appear in both spots, so the player does not need to build the same throne twice, nor can players mix and match which thrones to build.
It is possible to obtain over 12 million experience per hour by making demonic thrones using a demon butler. At that rate, a player would reach 200 million experience in around 15 hours, although that would cost around 185,324,571,675 buying magic stones from the Grand Exchange or 182,300,625,000 buying from the Keldagrimstonemason.