Which Additional gear?

Which of this additional gear can output more damage?
Devil circlet w/ yashiro dad?
Full beard w/ yashiro dad?
Bear hat w/ yashiro dad?
Im open to other suggestion of additional gear and xtal combination,
Im using mortal katar with agi>str build.

 

Without knowing your full build, I can't do nothing but analyse a single item % relative damage increase considering you always crit:
Considering you have 2x10%CD, 2x20CD, 255 str, 0% previous SRD and previous 0% ATK:
Devil Circlet+Dad: 1.03*(201*1.3+40)/(201*1.2+40) ~ 1.10 -> 10% damage increase
Full Beard+Dad: 1.09*(203*1.2+40)/(201*1.2+40) ~ 1.099 -> 9.9% damage increase
Bear Hat+Dad: 1.03*1.05 ~ 1.081 -> 8.1% damage increase

If you have more CD than I supposed, both circlet and full beard calculations will have a lower damage.
If you have more SRD than I supposed, all calculations will have lower damage.
If you have more ATK% than I supposed (100% likely, wth has 0% atk), bear hat calculation will have lower damage.
If you can't pay -25 crit without changing your stats, devil circlet AVERAGE damage will be lower.
if you don't have 100 crit, beat hat AVERAGE damage will be HIGHER.

 

I recommend NPC crafted ninja hat with yashiro dad. It’s has ATK UP(30%AGI). So about +82 if you have 275 AGI. It also has +3% critical damage and +3% long range damage. It would basically act as a happy medium between bear hat and devil circlet without the negative critical rate stat ^^

 

Im gonna use mortal katar knux with 75 crit rate +24cd, refine +A with mardula and neo maton(possible to change to white fang)
Fallen angel dagger 3% atk
My armor is atk7%cd10%cd20
Usami/ornlarf
My ring is machina with venena tuscog or power talisman with volgagon,
My current level is 114, but im planing on doing max agi 275> str 255,
hope this help with your analisys..

 

Thanks for that recommendation, i will make this one my secondary choice once i have farm the materials..