Ha - feel your pain....
Last night I spent 10mins complaining to my guildies in TS about the fact I could not get purple relics to pop. I'd crafted around 40 blue's, and nada...I then spent the last of my mats on 1 Serendipitous Assault, and 1 Focused Ret.....got both purp's.....
Go figure....RNG is not the *****......randomness is....