Heroics, we do them, we love them, we hate them. But regardless of how you feel about totems, you know that even if they are annoying at times, they are powerful. So I'm going to be doing a series of posts of which totems are useful in particular dungeons. I'm going to be going dungeon by dungeon and explaining what totems are awesome in what situations.
The Nexus -
There's not really much here that's helpful. If you don't have a well-geared group. You may consider using fire and frost resist on Grand Magus Telestra and Frost Resist on Keristrasza. Anomalus, Ormorok, and the Horde or Alliance Commanders there's not much new.
As for the trash, there's nothing special here. The Nexus is a pretty basic instance which doesn't have alot of the tricky mechanics of a higher level instance.