Parallels creates /Users/Shared/Parallels on boot, blocks ZFS /Users from mounting
Two commands to discover more about the two loaded items: 

sudo launchctl list com.parallels.vm.prl_naptd

sudo launchctl list com.parallels.desktop.launchdaemon


I can't guess the meaning of prl_naptd but http://duckduckgo.com/?q=%22com.parallels.vm.prl_naptd%22+%22addPaths%22 suggests some relationship between com.parallels.vm.prl_naptd and addPaths so maybe focus attention on this launch agent. 

An early guess: a workaround might involve wait4path 

wait4path(1) OS X Manual Page