Updating google apps on stock Nexus 5 causes bricking

I was on my Nexus 5. I hadn't updated google apps for a long time. Then one day, i thought "why not update hangouts" so I tried to get it through google play. Google Play updated itself. Then updating the rest was a bad mistake. It froze and now won't boot. I used these instructions: https://gist.github.com/deloz/6a9663ca7052fc4acf9c but for hammerhead m4b30z and could back to stock. But everytime I try to update google apps through wifi, it dies and won't work. I thought I could just live with un-updated google apps, but now, every few days, my phone just freezes up. Any suggestions would be helpful?