Not a Chaos player myself, but from the top of my head you don't have ready access to a bodyguard unit (one that happily takes mortal wounds to prevent a wound on a character) so that's out. Counter-sniping you'd probably need to ally something else in for as well.
Just to clarify, Chaos doesn't have access to any sniper units. At all. We have no effective way of removing characters or snipers. That is why it hurts so much, as all we can do it either transports or put the characters on bikes/discs/etc so they loose the Infantry keyword.