Kinda same boat here, I've read through here and its still a bit confusing, all the numbers anyways.
Currently, my Full KDF I have 16.8% Chance, and 117% Severity. I currently use all advance fleet AP with DMGx3 and CrtH, and 1 KCB. I tried swapping over to Fluidic AP all CritDx3, (per calculator) and was consistently doing less damage. I am assuming its because my CrtH was so low. Right now bonus accuracy is about 32-35% i believe.
Here is my build. Currently 1 male/1 female SRO, rest nausicaans (some reason it wouldn't let me select a second male SRO so i went with female)/ Stiill and traits are on there.