Do you even keep track of your own arguments? You brought up the Toxicrene to try to claim that creatures with no biology that don't eat or breathe were still vulnerable to poison.
I didn't bring up toxicrene at all, only barking Toads which aren't the same thing. There's different types of spores on Catachan not all of them have the same features, if you want to argue that they're all corrosive than by all means go ahead but you'll have to explain why Catachan weapons don't corrode to dust if that's the case.
As far as a source, how about you present a list of things that can't affect somebody in power armor instead, since you have so far sourced a total of a big fat zero.
There's a lot, which I why I am asking what they'll be coming across. We already know Power Armor can survive extreme temperatures and is vacuum sealed while being protective from extreme heat/physical force and radiation.
You keep repeating "unmodified" and "peak human" as if you haven't been shot down on that claim half a dozen times so far.
Erm you haven't really, you try to pass off a bunch of peak human feats as superhuman.
Show me Catachan throwing cars and not generic action movie hero stuff.
You've already had proof both in lore and rules that Catachans can soak damage with their bare skin equivalent to flak armor.
1. No the only source provided for lore is "The strongest" Catachan withstanding bullets without grimacing, not actually stopping bullets so it's a pain tolerance feat not durability and only applicable to the strongest one so you can't even scale others to it.
2. we're doing game mechanics? Mkay baseline Pre War Humans can punt Death Claws with their blows
You've already had proven that they're physically so strong they can hold up objects that would squash highly trained soldiers, who are themselves at the peak human level.
You actually never proved the other soldiers were peak human.
They get compared with Ogryns that are 2.5-3 meters tall.
Size doesn't matter stats does, in fact it's the dumbest thing you can be arguing for. If they're that big they're going to be easy to hit targets
"Peak human" has no meaning because the author will set that where they want. Catachan Jungle Fighters show blatantly superhuman abilities compared with real life.
Please show me Catachan running faster than a cheetah, deflecting small arms fire without flinching or being injured, tossing cars or creating shockwaves with stomps.
Or show me them withstanding radiation or actively resisting diseases that kill another person in minutes.
If they're not doing any of the listed you're just hyping up generic action movie feats and trying to compare them with Power Armor that can contend with actual super humans (Like Supermutants who can tear power armor users out of their armor with their barehands something that Death Claws take noticable effort to do and rely on their claws to do the damage over their car tossing strength)