OK, so fireworm launching mutoids are a slow, pain in the a** way to play (especially against heavily armoured opponents). But, it is amusing, and SOOOOO pretty, when you do this:
Boom blast works great on all the chiron artillery abilities, and frenzy can speed up the worms.
Fair warning: I was playing on a low difficulty, because I had been away for a while, and just wanted a fun game while learning the new content. So, I can’t say if this would work well on legendary, and I was REALLY wishing I had acidworms against the heavily armoured opponents here (although, it wouldn’t have been anywhere near as visually appealing).