I was once the maintainer of ArangoDB package in AUR. While the package was fine (I think), I am quite tired of having it compiled myself. It's just I am getting older, I guess. Then I prefer binary version after leaving maintainer role. Now I can use it using RPM file of OpenSuSE Factory version - available from ArangoDB download page. Some tweaks are needed anyway. I will give you some tweaks...
ArangoDB for Arch Linux - Binary Version Without Manual Compilation (AUR)