With the patch 18.7 in 2015 , we also got a few new items added. One of them was the combination of the Rings of Power.
The rings have a title level requirements attached to them, so bare that in mind before making one. The tradeskill process requires x6 in Quantum FT (for a ql 200 ring you are required 1200 in the skill). The combination process require the ring as "source" to be in 90% of the "target" range of the other ring so make sure you use a minimum ql 180 ring for a ql 200 end process.