The Utensil Poker is almost mandatory on missions with higher difficulty levels. The damage and spread it has is quite powerful, it’s overheat rate is rather slow, and is usually enough to kill higher difficulty chickens within 3 forks. (The carving forks. Two-pronged.)
As for the Neutron gun, it’s almost as powerful, just that it has a faster overheat rate, and straight fire. Also, it’s slightly weaker than Utensil poker. I’d say that this is the alternative for Utensil Poker.
As for the chaingun, it’s kinda situational. It can still kill pretty well, just that the heat can become a problem if you don’t fire it like a weapon from CS:GO (Just fire for at most 1 second, stop for a moment, and fire again). It’s overheat is not entirely useless though, it does pretty well on asteroid waves.
Corn Shotgun on the other hand… Do not get it until you have at least 8 firepower. The reload rate of it at lower power levels is Slowwww. However, at power level 10, it’s nearly instant. It’s damage is slightly stronger than Neutron Gun at 20 firepower, and it’s overheat rate is very slow.
Does that help you?