Quick question. Theres an upgrade which allows you to increase its rate of fire, and another which enhances its armour decreasing power per shot - what I want to know is, which do you find works better?

I ask because, during the demo at least, I found that it took four shots to kill a Scientist with it, and obviously each shot increases in power due to the armour reducing effect of each preceding hit. However, when I tried out the improved decrease upgrade I found it STILL took four shots to drop a Scientist, but with a much slower rate of fire.

Which of the two buffs do other players find to be more effective?