In a multiplayer format, Glorious End isn't really "take another turn" like it is in two-player formats
How many of them you play will vary depending on your budget, the colors of your deck, and your strategies and playstyle
Cloudpost is basically an upgraded version of Tron that is easier to assemble (you don't need three different lands to get the benefit) and can make even more mana (three Cloudposts make nine mana, while Tron makes seven), with the drawback being that the lands come into play tapped
I am guessing not a lot, but I am very sure diehard fans will be snapping the game just because of the King of the Monsters
It's not great but it's functional
So, use Prismite to pay and get a blue mana, and copy Irencrag Feat with Nivix Guildmage