The discussion, started two years ago, was about a Rogue having to choose from the Fort Assault rewards. So while the benefits of a mage were briefly discussed, again two years ago, the focus wasn't on mages.
If you're playing as a mage, you get a similar tough choice. Mages can use the ring or the pendant, both useful when you can get them. But, their companions could probably use the other items. Do you gear up for yourself, or gear your team? Choices.
As a polite reminder, typically it's better to start a new thread rather than necro an old post, but I can see you're following the discussion.