Shadowed has some good insight into blademaster weapons like ls and hammer, but it doesn't all apply to CB unfortunately.

You already play tyrannis so you probably know he basic setup already, so just get rid of artillery and put I've attack in its place. But to be more comprehensive...

Skills you must have:

Focus 3

Capacity boost 1

Guard 1

As much ice attack as you can fit. Kjarr ice can use all 5 levels but usually I do 4.

Weakness exploit 3

Then fill the rest with crit, attack and defensive whatever you want.

Xeno set bonus razor sharp is extremely good for CB as it halves blocking sharpness loss as well as attacking. I like it more than master's touch on CB, which only applied to crit hits.

I build mine around xeno gamma gloves waist and pants with Damascus chest and... Maybe Kaiser gamma helm?