[Imp]

My view using fire weapons in this type of situation is a double edged sword you can easily shoot yourself in the foot.

You can get lucky & have them punch above their weight & kill anything but best used as suppression which they are good at.
As said care needs to be taken with which hexes are set alight.
Great if the tank moves into a fire hex & is attacked but bad if you have to enter the fire hex to attack it.
You can strategically try to place fire hexes by Z firing with them its helped me a few times.