um....after seeing your Phoenix numbers did a quick search for my city's water quality report.....
WOW!... 37.5 gr/gallon
I knew it was hard but geez...
What I did on my softener setup......
My house has a rear entrance garage with the hot water and softener in a water closet in the garage. Had the plumbers tap into the output side of the softener with a spigot that I can hook a hose up to. They did it when they installed the softener and as I recall they only charged me a few bucks for the parts.
It makes a huge difference when it comes to preventing water spots! A "mod" well worth it when ya have water this hard!