Is specialization really needed to exploit the bonuses of a religion?
In your place, I would at least give up the scout, Uran. We already have one, and you need something that will make you a bit more durable. Although, what exactly... Well, and you need endurance.
I would do it like this: -scout -onslaught -god of death
+ death evasion and either charge (then shift some points from agility to endurance), or paralyzing spear (then leave agility as is).
Perception should be partially shifted to endurance in any case.
Something like that. Otherwise, I have doubts about 18% instant kill, you won't live long enough to get to that... Although, decapitation should be kept, yes.