This document is a step by step guide for setting up a bluetooth heaset with working audio on a fresh Manjaro i3 community build. It's assumed that all the following is done in sudo mode.
Note
The following guide serves mostly as notes for the future me that has to set this up again, it might not work for your exact setup. Feel free to request corrections. It's also quite likely that this works on most Arch builds.
Start by updating (or installing) bluez, bluez-utils and pulseaudio-bluetooth.
pacman -S bluez bluez-utils pulsaudio-bluetooth