I think you cannot root or install a recovery on the L9, no matter which comes first, without a PC. Kingo Root(the Windows version, not the app, if one exists) is good to root the stock rom, which you have to flash after the L9 got bricked. I would prefer flashing the revovery next, via PC, then flash the custom rom or a SuperSU zip with it, but as Fastboot doesn't seem to work with a Windows newer than Seven, it's Kingo Root via PC first, and next to install the recovery with an app like Flashify. Rooting could be done with ADB commands and SuperSu, but that's only worth it, if you want to keep that rom(like stock), as SuperSU is certainly a better SU tool than the one from KingoRoot.