Looking for a particular type of addon

[Mordekhuul]

In other news i've been recieving errors during Arena matches when I try to right click an opponents unit frame to bring up their focus frame. I had a couple errors which said something like "Power Auras is attempting to access an ability of the default Blizzard UI. Would you like to disable this addon and reset your UI?" Which is exactly the thing I want to do in the middle of an arena match. I've also seen these errors pointing to cartographer, both of which I fail to see how they would be trying to access the focus frame ability in the default Blizzard UI. Has anyone experienced this and if so were you able to find a solution other than just disabling all these addons? It seems to happen just randomly and often I'm able to access the focus frame bars with no problems. I no longer use Power Auras but still get the cartographer pop ups

I recommend picking up Gladius for enemy unit frames.

It works very well - I use it to change my focus (with a right click) all the time, and can be configured to do a lot of other useful things like show time left on each opponent's PVP trinket, show CC on an opponent and duraiton left, etc.