Those huds that track through walls are pretty damn laggy, most f the time at least. Not sure of what the FRAG one is, but one I checked was like 1.1 ms. As for wireframing and the like, I wouldn't suggest using it at all personally. I actually find that I got a lot better when I stopped using show look-at, and I don't have to worry about being fair/unfair in that regard. The mini-map gives me more than enough help.