Rajas will probably be better as the second ring, or at least it seems so with Shijin spiral according to Motenten's spreadsheet, which shares a common DEX mod.
Also, I was reading the wiki entry on critical hit rate, and there's something I didn't understand, regarding the way to test crit rates with WS:
What does the last bolded part mean? I understand perfectly how to do the test with normal hits, but this escapes me.Example: So say that you have a piece of equipment (like Assassin's Vest) with an unknown boost to Critical Hit Rate. The testing method would recommend you go to Abyssea, put on Atma of the Gnarled Horn, Atma of the Razed Ruins, and Atma of the Dark Depths (95% Critical Hit Rate with 5 merits) and the equipment. Swing away at something, and increase your critical hit rate by 1% per non-crit. The first sign of negative evidence (a non-crit) is enough to increment. At the final level, you should end up Critical Hiting 303 times in a row without seeing any regular hits, which makes you 95% confident that you've found your target value. From that point, you would add up your sources of critical hit rate and subtract them from 100%. The remainder is the critical hit rate on the equipment.
Past Critical Hit Rate tests relied on long parses against Hpmedes (N=10000+, as is seen in the references), Abyssea brought with it the possibility of a new way to test unknown Critical Hit Rate boosts. Overall, this is much faster than a similarly accurate Hpemde parse. On average, you would expect to swing 531 times to determine the critical hit rate of an unknown source with 95% confidence. The test will go much faster if you undershoot Critical Hit rate with your initial guess than if you overshoot it, and you should be able to get within 5% very quickly. This same method can be applied to Weapon Skills, using them as the X% unknown Critical Hit Rate.
XI Wiki


