Quote Originally Posted by Unregistered View Post
-- It could like "2018 DMM recap" or sthm along those lines. --
While this isn't a proper answer, there are tidbits of information in the encyclopedia in Sanahtlig's toolbox.
Quote Originally Posted by miguelsalvador81 View Post
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What should I prioritize on them? Attack? Total Power? Primary Bonus Effects? Seconday Bonus Effects Skills level? +xx enchantment?--
In order, for weapon it is
Same element Assault with a second skill > Same element Assault > off-element weapons
Of course, higher Atk is better, but that order should still hold. Your Assault skill levels are the biggest thing that contributes to your damage output.

For Eidolons, it's usually just whatever has the highest % in Main slot (though once you get more powerful you might want to avoid Character Atk Eidolons), and in the sub-slots just whatever has the highest Atk.