I said down not dead.
From where Ulthok is standing he saw Jessie drop #2, 1&3 knock each other and go down, 4 was knocked down by Ulthok and Aliya's arrows and was #6 split in half.
That's five on the floor. Cor and Aliya are standing over 1 and 3 ready to finish them off and 4 is not in good shape so by the time it gets back on its feet Cor will be all over it.
So Ulthok can't tell how many down are dead. He sees 5, 7 and 8 still standing. With Jessie closing on 5 and Barrell raging on 8 that leaves 7 unattended.
