The needler

If the needler manages to return in halo 4 (and I think it will, it is an iconic halo weapon) do you think it should do damage as soon as it hits you, damage after the needles explode, or half when it hits you and half when it explodes. I was thinking this when playing CEA and noticed that the needles damaged you when they exploded

The distinguishing feature of the Needler is that death results from causing a supercombination and not from boring old being shot. You should take minimal damage from each Needle when a) it hits you and b) it explodes, the only meaningful damage should be done when you manage to get 7 Needles into them at once.