Got past Argath by splitting my forces to take out everyone but Argath first. At one point, all i had was a female chemist at 10 health
I brought Argath's speed down enough with rend speed (lucky i had it from a couple fights ago).
I keep fearing some of the final battles. This one took, like, 10 tries before I came up with the right strategy. My first was to barrell right at him, didnt work. Then I did the hug strategy and just got bombarded by Almagest. Splitting worked, but I didnt learn Ultima again >.<. Oh well, onward and upward.