Firstly, I'd like to say that Cavemen on fire! ug. is a great name.
I would even go so far to suggest quick improvements to it, maybe Ug the Caveman is on fire, or Ug(gh)! Caveman on fire! (Because Ug, UG, yeah, funny).
In terms of the deck itself, it seems pretty solid. I would drop a photon, since you can immolate phoenixes anyway, and from that add a vampire dagger. (Lots of excess nova ish quanta)
A pillar/pend split is just one of those things that helps 1/100 games, but it might as well be done.
Something else to look into, which I would suggest is dropping the photons for damselflies, now that they have been buffed and all. Slightly slower, but it gives you much more long term quanta, and you risk bad draws less.
I also have 2 less pillars in my version, because of the damselflies (chosen to use 6). The replacements were minor, fog shield and vampire dagger, both which slow the game down, hopefully enough for you to get your attack in.
The deck below shows 3 unstable gases being upped, just ignore that, turns out I only have 3 unupped unstable gases (Easy win Oracle Octane deck
).
Hover over cards for details, click for permalink
5f9 5f9 5f9 5f9 5f9 5f9 5fc 5fc 5fc 5fc 5fc 5oc 5oc 5oc 5oc 5oc 5od 5od 5od 5od 5od 5od 5og 5om 5om 5om 5ur 7n6 7n6 7n6 8pr
Should be a decent improvement. Good luck with it