Personally, I have minmaxed in many other MMORPGs, but in FFXIV, the difference in max stat options is negligible. The ability to dodge mechanics far outweighs the benefits gained from maxing stats per situation in FFXIV. When it comes to multiple sets of the same iLevel, the choice is yours. The effects of your choices will have little impact in your overall performance / effectiveness, unless you are in a situational fight (see: WHM in turn 4 avoiding crit stat).