Quick! Need a little Naruto help?

Alright, since my last question was a bust, I'm going to ask a new one.

I'm writing a fan fiction story that is a crossover of Naruto and Halo (post Ark). The question is which of these two should gain the use of charka:

The Brutes (it just makes them stronger and more of an bullet sponge) or The Flood (they do stuff like walk through walls and become indestructible and appear out of nowhere). How they aqquire charka is The Brutes gain it by stealing the Tailed Beasts from Akatsuki (in a very bloody battle). The Flood by infecting and assimilating a free Tailed Beast (That's a whole lotta biomass) and the people in Naruto's world.

Also, tell me if it sounds like a good idea.