wow, those IG autocannons and missile launchers really aren't going to stop me...even though your using catachans it still means you can only see 12" into the jungle (more than my 6" admittedly). By the time you have a chance to fire them you'll only get at most a turns worth of shooting out of them. simply put:
Blood for the Blood God, Skulls for the Skull Throne!!
Courtesy of Hairyyahoo
here is the Catachan Codex