Technically no single 'ideal'. Aside from issues of what gear you can actually acquire (eg: limited to AH, or Yilbegan drops ok? if Usukane is off limits, would think other hard-to-acquire gear is as well), there's a limit to how good certain gear is in certain scenarios. For example, in Abyssea with str buffs, and with fire path Taipan Fangs, it becomes extraordinarily easy to cap fStr, making the value of Str on other gear easily diluted (Shura body will usually outdo Osode for weaponskills, for example). Variables also change based on target mob and food being used.
I keep trying to write an answer, but it always comes down to the fact that the question is far too open-ended. Choice A beats choice B, unless working under condition x, or fighting mob y, or getting buff z. Choice C may be better than both, but is ludicrous to suggest due to difficulty in acquiring. If it were feasible for you to acquire, then you should know better in trying to formulate such a question and narrow the scope to something answerable.
What Phoenyx answered is certainly reasonably good, but it's also definitely not 'ideal'.
XI Wiki


