Why would Imu give a fuck when rocks died and PU you get from DR is base on strong were before.
DR rocks was made kill his family and everyone around him and then the knight to kill him after he came out DR.
Because he no longer had any use for him and because Imu did not want him to escape.
With harlald him getting kill effect Imu plans of controlling elbaf and also hurt him .
The context around there fights and story was very differnt in how it was done.