Xperia Z3 Root without Downgrade?

Hi, I updated m device to the 6.0.1 and unlocked the bootloader with the intention to put a custom recovery mode in it, and eventually root it. Now I've read tons of topics where the followed procedure assumes a downgrade to KitKat and a preparation of a pre rooted Marshmallow, but isn't there a way to avoid this? I mean I only want root permissions, I don't want any self customized rom such as this sound.

Thank you for the attention, hope this is useful.

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