@gekkegerrit: not worth, u can always get critical rate from Legion & link skill from Phantom & Beast Tamer,
if it was for me, I wouldn't want Critical rate on weapon and 2ndary and Emblem as well. I'd stick with either attack%/ dmg%/ Boss%,
I'm no good with stats formula(it's better find someone suitable who has the formula) but to put it simple;
attack% does multiplicative n damage% does additive, well I dont think can explain it in detail it's not my field lmao but that's just based on my experience
%damage is almost always bad because it stacks additively with %boss damage. which of the two is better between %damage and % attack is just a question of "of which do i have more?" you get the one of which you have less.
so if you have 50% attack and 30% boss damage. 9% damage would be better than 9% attack. if you have 90% damage and 10% attack, then 80% attack would be better than 80% damage.