Isshin And CSB Bya Test

Zento-Hazashi

seemed like it was more dangerous for you when you used Byakuya, i mean him T1 is awesome since they lose out on 10% speed, so having Isshin attack afterwards is fine, but it's still dangerous to what i saw...

With Isshin however, you took out that danger, leaving 4 of your formation alive, which was nice since you also was able to deal with the vanguard faster too

But Byakuya also dealt with enemy supports faster..

Personally i'd choose Byakuya because he does things better (In terms of importance) but that means you'll need to get Isshin nearly as fast has him too, so his skill take place covering the fact that he isn't T1 like Byakuya

Or you could do both, just for certain enemies xD