Default Result of restoring factory settings on rooted nexus 4 with multiple Roms

Hi All,

I have Multiple ROMs namely, Cm11 snapshot m5, PAC ROM(being the primary) and Firefox. Since repetitive app backups on titanium backup is eating lot of space as well as backup roms. I wanna clean install Cm11, firefox and Ubuntu(just wanna try). What will be the effect if restore factory settings on my primary ROM. Recovery, multi boot files, patch for kernels will be intact or I have to redo?
Any other suggestions will be appreciated.

Sent from my Nexus 4 using xda app-developers app