Technically Ossmat flipped to Gotland's control when Jomorosh showed up, but Ar Agyr and Thalmarkin were the ones nearby to boot him out. That makes three daimon-lord kills for Ar Agyr in this invasion: Jactosh was killed by Outo in Jyl, Akkan was executed by Enrico, Jomorosh was a joint effort between Thalmarkin and Ar Agyr with one of our nobles dealing one of the wounding blows that allowed him to be killed. So it's either 2.5-3 depending on how much credit Thalmarkin will share