[Xrystal]

Ah thats what the problem is.

Arcane Power isn't a bar its a self buff you get.

Similar to the resto druid harmony self buff and tanks vengence self buff.

Here's a screen shot on normal ui setup.

The bars that were added for the other classes weren't for all of the classes abilties it seems, as the ones set up in nUI are based on the bars created by blizz in Cata. The ones I mention above were left out of that bar set up by blizz.