In Rift, I play in a guild called Ascended of Corthana on the Faeblight shard. We're a casual raiding guild that had some pretty severe numbers problems right around the time that Infernal Dawn came out. We've fixed that, and after we merged in another, similar guild we're now back on track and raiding ID while still clearing the last few bosses of HK for farm loot.
But our raiding Mage count is still very low, and as Mage class lead, I've had to bring the heavy utility to raids so that we don't end up with none. Obviously, I have to have a support (Archon) spec so that I can buff the raid if need be, but fights like every ID boss thus far in our progression along with HK bosses that I still farm from time to time like Prime and Prince require pretty specialized Mages for specific utility roles.
I've long had multiple specs to handle all of these, but now that utility is starting to become the primary thing that I bring to raids, I've been trying to consolidate. To that end, I now have two basic utility builds: