Own my R/N arena build

Was thinking of trying a R/N BM/Blood build in the arenas. Lemme know if I am missing anything:

Attributes:
Blood: 12
Expertise: 10 (8 + 1 + 1)
Beastmastery: 13 (10 + 3)

Skills:
Charm Animal
Comfort Animal
Ferocious Strike {E}
Call of Haste
Res signet
Plague Touch
Vampiric Touch
Strip Enchantment

The goal would be to use Ferocious Strike as an energy engine for vamp touch. 10 expertise would bring Ferocious strike into a net energy engine of like 6 mana per 8s, it would also reduce vamp touch to a cost of 9 mana for 65 armor ignoring damage every 5s. In addition ferocious strike would add to the damage through my pet, and the 13 BM would allow for a moderate damage from pet alone. The main problem as I see it is going up against running casters. There is no real snare possibility with this build. Though its possible to exchange call of haste for the pet snare (Maiming Strike).

This made me laugh. That's way cool. With your blood magic, try siphon for runners. Better than nothing.

:Edit:
I just noticed you have call of haste. Trash that, it's garbage. Anything is better.
Or... get rid of your signet for maiming strike, keep haste... then you have the runners for sure.