Spartacus: House of Ashur

In the original series, the character Ashur was killed by Naevia on Mount Vesuvius prior to Spartacus' victory over Glaber. In order for this story to be told, at least one of three things must occur. (1) Ashur helps ensure Spartacus' defeat and is rewarded with Batiatus' Ludus as he'd envisioned. (2) Ashur kills Naevia in their dual but is allowed to leave with his life only to later escape from Glaber in the confusion of his losing battle. (3) Ashur turns on Glaber before Lucretia betrays him and leaves Vesuvius with his men.