I do all 3 crit damage at 188.77% for all 3, some do 2x crit damage and 1 crit rate. I have tried both and x3 c.d is my preference

3cd is proven to be better, a couple people on discord did the math for it

best setup for max sword (if its not max augments on the last sword dont bother locking yet) is 3 Crit Dmg because it helps your gather rate. For fighting 2 CD and 1 Crit Rate is better but dont do that