Check your server prices for materia first if you want usable stats on it. It costs around less then 500k to make a fresh relic weapon on my server now as materia prices have dropped more than 90% of what they used to be.

It's a nice glamour to have for the future though. In addition, there has been some talk of getting a head start in the next relic line if you complete the full Zodiac Zeta upgrade for your specific weapon/class. :0 I wouldn't recommend getting the weapon at the moment if you're using it for actual use since the new level cap is 60, and that staff will only really last you until level 55.