I average around 1.5 with MU Z perm, I just don't like the AUF with it. It's opposite whatever it would normally be. For example. U', M2 U M2 U M' U2 M2 U2 M, you can see the AUF is now off by a U' again, but it's actually not. Doing the alg from this position yields a U off from solved at the end, so to determine auf before PLL, you must use the inverse of what's in your head during the solve.