Can't root my ZenFone 2 Z008 (550ML)

Hi guys, I'm having troubles trying to root my ZF2 550ML.
I unlocked the bootloader, installed TWRP and rooted it from the official Asus ROM, then installed some custom roms, but I did once wipe everything because I had a bootloop, then reinstalled CM 13 and it's working great, but I tried to root with method 2 & 3 from http://ift.tt/1IL0tJp but it wasn't working, it gave me bootloop as well...

I downloaded the official ROM from Asus, should I wipe everything then reinstall the ROM from the recovery?

Thanks for the help :(

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