Head health and body health question

Hi,

i got a really noob question about the zed health systems in Killing Floor 2.

For the example, take a 6 player HoE Scrake. His body have 5967hp, and his head have 1875hp.

Some people tell me that a zed died only if one of those values goes down to 0. If you shot a Scrake and cause 5966hp damage to his body, and 1874hp damage to his head, he is still alive because he still have 1hp to his body, and 1hp to his head.

So if I understand correctly :
- all players shooting only the head is the best solution because it has far less health, so killing it is fast.
- all players shooting only the body is not a good solution because it has much more health, so killing it is less fast.
- some players shooting the head while the others shoot the body, is the worst thing to do, because all the damage the teams can do is invisibly split between two health bars, so killing it take much more time

Is it right ? Please correct me if I'm wrong, I really want to understand this gameplay mechanics.

Thanks by advance.

Head health and body health question